Page 1
DO NOT DESTROY DO NOT DESTR[ILLEGIBLE] FOIPA #1142292 62- HQ-83894 Serials EBF 164 62-HQ-83894-EBF 164 EBF +
Page 2
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." [HW: additional copies behind file] [STAMP: ENCLOSURE] [STAMP: RESTRICTED] C9-4892,AF
Page 3
(2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. - 2 - RESTRICTED
Page 4
b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 5
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 6
17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc? b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources RESTRICTED
Page 7
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 8
3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 9
RESTRICTED RESTRICTED
Page 10
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 11
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude.
Page 12
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 13
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 14
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6. Ability to determine: a. Color. b. Speed of moving objects. c. Size at distance. 7. Reliability of observer. a Sources. RESTRIC TED - 5 -
Page 15
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses: a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 16
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 17
RESTRICTED RESTRICTED
Page 18
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 19
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 20
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED - 3 -
Page 21
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 22
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6. Ability to determine: a. Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 23
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 24
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 25
RESTRICTED RESTRICTED
Page 26
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 27
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that, wherever communications facilities permit, subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 28
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 29
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 30
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc? b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 31
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 32
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 33
RESTRICTED RESTRICTED
Page 34
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 35
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude
Page 36
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 37
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 38
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 39
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 40
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 41
RESTRICTED RESTRICTED
Page 42
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 43
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude.
Page 44
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED - 3 -
Page 45
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 46
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a.Is observer amateur astronomer, pilot, engineer, etc b.Length of time engaged in hobby (experience). 6.Ability to determine: a.Color b.Speed of moving objects c.Size at distance 7.Reliability of observer a.Sources
Page 47
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target execute any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 48
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 49
RESTRICTED RESTRICTED
Page 50
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 51
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude.
Page 52
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED - 3 -
Page 53
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 54
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 55
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 56
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 57
RESTRICTED RESTRICTED
Page 58
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAKO-3." RESTRICTED
Page 59
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude. RESTRICTED
Page 60
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11 Evidence of exhaust a Color of smoke b Length and width
Page 61
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 62
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 63
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 64
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 65
RESTRICTED RESTRICTED
Page 66
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 67
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 68
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 69
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size (2) Shape (3) Location
Page 70
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 71
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 72
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 73
RESTRICTED RESTRICTED
Page 74
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 75
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 76
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 77
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 78
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc? b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 79
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 80
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 81
RESTRICTED RESTRICTED
Page 82
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 83
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. - 2 - RESTRICTED
Page 84
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED - 3 -
Page 85
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 86
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6. Ability to determine: a. Color b. Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 87
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses: a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 88
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 89
RESTRICTED RESTRICTED
Page 90
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 91
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 92
RESTRICTED Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (8) Clock position of object from observer’s aircraft. (4) Latitude and longitude. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4, Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. Time in sight. Appearance of object. a. Color. Shape, (Sketch if possible) Apparent construction. (Of what material or substance) Size. (1) Estimated size. Direction of flight. Tactics or maneuvers, Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. Evidence of exhaust. a. Color of smoke. +b. Length and width. RESTRICTED
Page 93
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 94
RESTRICED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6. Ability to determine: a. Color. b. Speed of moving objects. c. Size at distance. 7. Reliability of observer a Sources. RESTRICTED
Page 95
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 96
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 97
RESTRICTED RESTRICTED
Page 98
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called ‘‘Flying Discs.’ b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, “Dass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIAXO-3. RESTRICTED 9-892,AF
Page 99
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. - 2 - RESTRICTED
Page 100
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 101
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 102
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a.Is observer amateur astronomer, pilot, engineer, etc b.Length of time engaged in hobby (experience). 6 Ability to determine: a.Color b.Speed of moving objects c.Size at distance 7 Reliability of observer a.Sources
Page 103
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 104
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 105
RESTRICTED
Page 106
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 107
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building (story), yard etc. (4) Map coordinates (if feasible showing latitude and longitude. RESTRICTED
Page 108
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 109
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 110
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 111
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses: a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 112
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 113
RESTRICTED RESTRICTED
Page 114
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 115
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude.
Page 116
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 117
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size. (2) Shape. (3) Location. - 4 - RESTRICTED
Page 118
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 119
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 120
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 121
RESTRICTED RESTRICTED
Page 122
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 123
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that, wherever communications facilities permit, subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude
Page 124
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED - 3 -
Page 125
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d Visible exhaust or jet openings 16 Control and stability a Fins b Stabilizers (horizontal or vertical) (1) Size (2) Shape (3) Location
Page 126
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies a. Is observer amateur astronomer, pilot, engineer, etc? b Length of time engaged in hobby (experience). 6 Ability to determine: a Color b Speed of moving objects c Size at distance 7 Reliability of observer a Sources
Page 127
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 128
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 129
RESTRICTED RESTRICTED
Page 130
RESTRICTED DEPARTMENT OF THE AIR FORCE HEADQUARTERS UNITED STATES AIR FORCE DIRECTORATE OF INTELLIGENCE WASHINGTON 25, D. C. 15 February 1949 AIR INTELLIGENCE REQUIREMENTS MEMORANDUM NUMBER 4 UNCONVENTIONAL AIRCRAFT PART I - GENERAL 1. PURPOSE The purpose of this memorandum is twofold: a. To enunciate continuing Air Force requirements for information pertaining to sightings of unconventional aircraft and unidentified flying objects, including the so-called "Flying Discs." b. To establish procedures for reporting such information. 2. RESCISSION Department of the Army Collection Memorandum Number 7, dated 21 January 1948, and letter, CSGID 425.1, dated 25 March 1948, both subject as above, which have been transferred to Air Force agencies for action, are herewith superseded. 3. REPORTING a. General (1) As complete an answer to the requirements enunciated in Part II, as may be procurable, should be dispatched by means of electrical transmission immediately after sightings. (2) Supplementary reports should be forwarded as available by the most expeditious means consistent with the importance of the information reported. b. Major Air Commands (Overseas) and Air Attaches (1) Initial and supplementary cabled reports will be transmitted to the Director of Intelligence, Headquarters United States Air Force. Cables will contain the phase, "Pass to COMGENAMC WRIGHT-PATTERSON AFB, DAYTON, OHIO, ATTN: MCIA XO-3." RESTRICTED
Page 131
RESTRICTED (2) Supplementary written reports, prepared on AF Form 112, will be forwarded to the Director of Intelligence, Headquarters United States Air Force. (3) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (overseas) and organizations under their control in connection with the development of information on this subject. c. Major Air Commands (ZI) (1) Reports will be forwarded direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3 by installations receiving information pertaining to the requirements enunciated in Part II. (2) Copies of such reports may be supplied the Command Headquarters of the installation concerned. (3) A copy of all reports sent to Air Materiel Command in accordance with these instructions will be forwarded at the same time to the Director of Intelligence, Headquarters United States Air Force. (4) Written reports will be submitted on AF Form 112. (5) Commanding General, Air Materiel Command is authorized direct contact with major Air Commands (ZI) and organizations under their control in connection with the development of information on this subject. d. Non-Air Force Agencies (1) Addressees other than those of the United States Air Force are requested to forward reports direct to the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attn: MCIA XO-3. (2) In order to reduce the time factor involved in transmission of this type of information it is requested that wherever communications facilities permit subordinate elements be authorized to communicate reports direct to the Commanding General, Air Materiel Command. PART II - REQUIREMENTS General 1. Date of sighting. 2. Time of sighting (zonal by 24 hr. clock). 3. Where sighted (observer's position): a. Ground (1) City, town. (2) Distance and direction from city or town road intersection etc. (3) From building story yard etc. (4) Map coordinates if feasible showing latitude and longitude.
Page 132
RESTRICTED b. Air (1) Type aircraft, speed, altitude, direction of flight. (2) Distance and direction from city, town or known landmark. (3) Clock position of object from observer's aircraft. (4) Latitude and longitude. c. Sea (1) Latitude and longitude. (2) Proximity to land. (Name city, country, etc.) 4. Number of objects. Formation type (if any), sketch if possible. 5. Observable celestial phenomena or planets that may account for the sighting. (Local facilities or organizations which follow such celestial phenomena should be consulted for such information.) 6. Distance of object from observer. a. Laterally or horizontally. b. Angle of elevation from horizon. c. Altitude. 7. Time in sight. 8. Appearance of object. a. Color. b. Shape. (Sketch if possible) c. Apparent construction. (Of what material or substance) d. Size. (1) Estimated size. (2) Size as it appeared from observer's view. (Compared to known object) 9. Direction of flight. 10. Tactics or maneuvers. Vertical ascent or descent, horizontal, oscillating, fluttering, evasive, aggressive, erratic, etc. 11. Evidence of exhaust. a. Color of smoke. b Length and width. RESTRICTED
Page 133
RESTRICTED c. Odor (if any). d. Rate of evaporation. e. Does trail vary with sound? (spurts) 12. Effect on clouds. a. Opened path thru clouds. b. Forced cloud or mists. c. Reflected on cloud. d. Showed thru cloud. 13. Lights. a. Reflected or attached. b. Luminous c. Blinked on and off in relation to speed. 14. Support a. Wings. b. Aerodynamic list of fuselage. c. Vertical jet. d. Rotating cylinder or cone. e. Aerostatic lift (balloon or dirigible). 15. Propulsion a. Propeller or jet. b. Rotor. c. Aerodynamic vanes (flapping or oscillating) (Katz Mayer effect). d. Visible exhaust or jet openings. 16 Control and stability a Fins b Stabilizers (horizontal or vertical). (1) Size (2) Shape (3) Location - 4 - RESTRICTED
Page 134
RESTRIC TED 17. Air ducts. a. Slots. b. Duct openings. 18. Speed - M.P.H. 19. Sound. a. Continuous whine or buzz. b. Roar, whistle, whoosh. c. Intermittent. 20. Manner of disappearance. a. Explode. (1) Possibility of fragments. (2) Other physical evidence. b. Faded from view. c. Disappeared behind obstacle. Relative to the Observer 1. Name of observer. 2. Address. 3. Occupation. 4. Place of business. a. Employer or employee. 5. Pertinent hobbies. a. Is observer amateur astronomer, pilot, engineer, etc. b. Length of time engaged in hobby (experience). 6. Ability to determine: a. Color. b. Speed of moving objects. c. Size at distance. 7 Reliability of observer a Sources
Page 135
RESTRICTED (1) Neighbors. (2) Police Dept. (3) FBI records. (4) Employer. 8. Notes relative to observer on: a. Sightings in general. b. How attention was drawn to object(s). (1) Sound. (2) Motion. (3) Glint of light. c. Degree of fatigue and duration of flight at time of sighting in cases where observer is airborne. 9. Witnesses. a. Addressees. b. Occupation. c. Reliability. 10. Comments of interrogator regarding the intelligence and character of person interrogated. Relative to Radar Sightings 1. Re radars operating on ground. a. Observations of range, speed, altitude and size of target. b. Did target executive any turns? If so, what angle (180°), etc., and what radius of turn. If radius of turn is not observable, how long did the target stay in the turn and what was its speed? c. Note particularly any separation of distant target into several targets upon approach. Track all if possible. 2. If airborne when object sighted. a. Were there any radar inductions or extra noise on radio circuits? b. Give estimates of size, speed, maneuvers, etc. GENERAL 1. Teletype sequences of local weather conditions. 2. Winds aloft report. - 6 - RESTRICTED
Page 136
RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vicinity at the time. (Check Canadian activity if close to that border.) 4. Possible releases of testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 5. If object contacted earth, obtain soil samples within and without depression or spot where object landed (and then presumably departed) for purpose of making comparison of soils. 6. If object came sufficiently near other aircraft or known objects check surfaces with Geiger counters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, i.e., (any projections or extentions that might presumably be construed as such). C.P.Cabell Major General, USAF Director of Intelligence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central Intelligence Special Assistant for Research and Intelligence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (INT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED
Page 137
RESTRICTED RESTRICTED