Department of War Flying Disc Compilation, 1949-1950

Brief

The file assembles multiple UFO sighting reports submitted in compliance with the 1948 Flight Service Regulation 200-4, covering incidents primarily from 1949 through at least January 1950. Witnesses span both military personnel and Civilian Aviation Authority observers, and each report captures date, location, weather conditions, altitude, and detailed accounts of object appearance and movement. Supplementary materials include message traffic from the Military Air Transport Service and Army Airways Communications System, additional military intelligence reports, hand-drawn or printed diagrams, and a report originating from a weather station in Japan — suggesting geographic reach beyond the continental United States.

Metadata

Agency

Department of War

Release

5/8/26

Incident

1/9/50

Type

PDF • .pdf

Length

143 pages

Programs

FSR 200-4, Military Air Transport Service (MATS), Army Airways Communications System (AACS)

Tags

flying disc, military witness, CAA witness, 1949, 1950, Japan, Pacific theater, FSR 200-4, MATS, AACS, diagrams

Key points

• Reports were filed under FSR 200-4, the 1948 Flight Service Regulation governing UFO reporting procedures.
• Witness pool includes both military sources and Civilian Aviation Authority personnel, broadening the evidentiary base beyond strictly military observation.
• Each incident report records date, location, weather conditions, altitude, and descriptions of object appearance and movement.
• Message traffic from the Military Air Transport Service and Army Airways Communications System is incorporated, indicating command-level awareness.
• The file contains diagrams — the type and subjects of which cannot be confirmed without OCR — alongside additional military intelligence reports.
• A weather station report from Japan is included, placing at least one incident or corroborating data point in the Pacific theater.

Most interesting

• The Department of War was formally reorganized into the Department of Defense in September 1947; this file's originating agency designation reflects either the institutional predecessor or a declassification-era attribution convention.
• Inclusion of Civilian Aviation Authority observers alongside military witnesses was consistent with late-1940s efforts to aggregate all credentialed aerial reports under a single reporting framework.
• The Japan weather station reference situates at least part of the file's scope in occupied postwar Japan, where US military and air traffic infrastructure was active during this period.
• FSR 200-4 established standardized reporting fields — date, location, weather, altitude, appearance, movement — creating a proto-database structure for UAP incidents nearly two decades before Project Blue Book's formal methodology.
• The presence of diagrams in a scanned, pre-OCR file suggests original hand-drawn or typed figures that may depict object shapes, flight paths, or geographic maps.