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This FBI file serial 164 in 62-HQ-83894 holds several copies of Air Intelligence Requirements Memorandum Number 4, "Unconventional Aircraft," issued 15 February 1949 by the Directorate of Intelligence, Headquarters United States Air Force. Major General C. P. Cabell signed it. It sets out continuing Air Force requirements for information on unconventional aircraft and unidentified flying objects, including "Flying Discs," and tells commands and outside agencies to send reports to the Air Materiel Command at Wright-Patterson AFB. It also lists detailed reporting questions on sightings, observers, radar data and physical evidence.
RESTRICTED 3. Local filght schedules of commercial, private and mmtary aircraft flylng 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. 11 object ca.me sufficiently near other aircraft or known objects check surfaces with Gelger cowiters for possible radioactivity. Make comparisons with other unaffected aircraft objects, etc. 7. Obtain photographs (or original negatives) where available; 1f not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where lt contacted earth (lf this happened). d. Maneuvers. e . Formation Ii objects were more than two. 8. Secure signed statement. 9. Obtain fragments or physical evidence where possible . 10. Was any r adio antenna to be observed, Le. , (any projections or extentlons that might presum ably be construed as such). C. P. CABELL Major General, USAF Director of Intelllgence, Office of Deputy Chief of Staff, Operations DISTRIBUTION: Commanding Gener als, Major Air Commands, ZI and Overseas All United States Air Attaches Dir ector of Central Intelligence Special Assistant for Research and IntelUgence, Department of State Director of Intell1gence, GSUSA Chief of Naval Intelllge nce Commandant (INT), United States Coast Guard DI.rector, Federal Bureau of Investigation RESTRIC TED - 7 -
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