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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 fllght schedules of commercial, private and mll1tary aircraft flying in vidnlty at the t ime. (Check Canadian activity l.f close to that border.) 4. Possible releases of testing devices in vlcinlty 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 Gelger 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 wher e 1t contacted earth (if this happened). d. Maneuvers. e. Formation if objects were more than two. 8. Secure s igned statement. 9. Obtain fragments or physical evidence where possible. 10. Was any radio antenna to be observed, Le., (any projections or extentlons that might pr esum ably be construed as such). e>:P~C. P. CABELL Major General, USAF Dlrector of Intelligence, Office of Deputy Chief of Staff, Operations DISTRlBUTION: Commanding Generals, Major Air Commands, ZI and Overseas All United States Air Attaches Director of Central lntelllgence 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 Invest1gatlon RESTRICTED - 7 -
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