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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.
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RESTRICTED 3. Local flight schedules of commercial, private and military aircraft flying in vic1n1ty at the tlme. (Check Canadian activity 1f close to that border.) 4. Possible releases o:f testing devices in vicinity sent aloft by Ordnance, Navy, Air Force, Army, Weather Units, Research Organizations or any other. 6. If object contacted earth, obtain son 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) wher e available; if not, secure sketches of: a. Object. b. Surrounding terrain where observed. c. Place where it contacted earth (1:f this happened). d. Maneuvers. e. Formation 1:f 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, Le., (any pr ojections or extentions that might presum ably be construed as such). e>:P~C. P . CABELL Major General, USAF Director of IntelUgence, 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 Resear ch and Intelllgence, Department of State Director of Intelligence, GSUSA Chief of Naval Intelligence Commandant (I.NT), United States Coast Guard Director, Federal Bureau of Investigation RESTRICTED - 7 -
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