Documents / Report
This Top Secret Air Intelligence Division Study No. 203, prepared jointly by USAF and ONI intelligence and dated 10 December 1948, analyzes about 210 reported flying object incidents in the United States. It concludes that some type of flying object has been observed, but that its identification and origin cannot be determined. The study weighs domestic explanations such as weather balloons, rockets, flying wing aircraft and celestial phenomena against possible Soviet devices based on German flying wing designs. Its appendices include selected incident reports and descriptions of flying wing aircraft.
From the source:Release of 2026-07-10 Incident: 12/10/48, Virginia. This file contains a U.S. Air Force (USAF) Air Intelligence Division study, “Analysis of Flying Object Incidents in the United States,” Study No. 203, dated 12/10/1948. The analysis includes an assessment of various reported unidentified flying object (UFO) incidents and theories to account for their nature and origin. Overall, the study assesses that “it appears that some object has been seen; however, the identification of that object cannot be readily accomplished.” The study offers that two “reasonable” origins might account for the phenomena: technologies of a domestic or foreign origin. It also suggests that, if foreign, it is prudent for the United States to assume that UFO observations are attributable to scientific, military, or intelligence activities of the Soviet Union, and, in that case, to take seriously the threat such objects may pose. The file also contains contemporary UFO reports and examples of experimental “flying wing” type aircraft planforms that might account for certain commonly reported UFO characteristics. AARO Comment: This file appears to be an earlier draft version of the file contained in DOW-UAP-D094, whose content is substantively similar.
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assumes a definable pattern. There is a large concentration of sightings along the Eastern Seaboard; another large concentration throughout the Western Coast states, and a few sightings in the Middle West. Distribution of incidents by configuration of object and description of maneuverability is approximately equal in each of these areas and this is believed to further substantiate the possibility that one type of object might have been observed in different aspects of flight. If sightings are induced by rumor, it seems unusual that more incidents have not been reported from the areas with high concentration of population. Reports from such areas would also have greater facility in channeling either to newspapers or official reporting agencies. For the most part, sightings have been made in fairly open country where there are few restrictions to visibility, which may indicate that obstructed vision has reduced sightings in built-up areas. It therefore seems that some type of flying object has been observed; the identification of its origin requires the completion of other analyses. 3. Possible Origin of Unusual Flying Objects. Provided, upon the completion of analyses, it is indicated that some or all of the reported flying objects over the U.S. are of foreign origin, the objects could from a logical viewpoint, be considered Soviet. It is evident from the performance characteristics attributed to the unidentified objects at this time that if they are foreign, they involve efficiencies of performance which have not been realized in any operational airborne device in this country. It would, therefore, be a mistake to analyze the technical aspects of the situation within the limits of our own knowledge of practical developments. It is more desirable to consider then the outer limits of possible Soviet developments and objectives in attempting to formulate some idea of the tactics which might be involved.
Report, from the pursue collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 67 pages are in the text index: search them above, or from the library's search.