Documents / Official release
This U.S. Department of War file collects Project Sign era checklists and incident summary sheets for incidents 101 to 172. The largest item is the 18 February 1948 explosion over Norcatur, Kansas. For it the file gathers witness statements, speculative letters from Norman G. Markham, and Dr. Lincoln LaPaz's view that it was a genuine meteorite fall with curious aspects. Other entries cover B-29 crews, a two-decked wingless object over the Netherlands, a Turkish rocket report, a Moscow sighting, and George Gorman's 1 October 1948 Fargo encounter.
From the source:Release of 2026-05-08 Incident: N/A, N/A. NARA Record Group 38, catalogue id 143685. Each of these incident summaries includes a "Check-List - Unidentified Flying Objects" that contains details about the incident. Many summaries also include witness lists or statements and other narrative reports or descriptions.
“Seattle”1 page
CHECK-LIST - UNIDENTIFIED FLYING OBJECTS 1. Date Approx 1 Mar 48 Incident # 150 2. Time - 0930 hours 3. Location Swedish Coast 4. Name of observer N/S - a Norwegian pilot 5. Occupation of observer ONL pilot Address of observer N/S Material taken from MA R-130-48 NAD 20560 7. Place of observation Air-enroute from Aalberg, Denmark to Oslo, Norway Number of objects 9. Distance of object from observer N/S 10. Timo in sight 4 seconds 11. Altitude 20,000 ft 12. Speed N/S 13. Direction of flight Southeast - passing along Swedish Coast and disappearing over Norway 14. Tactics N/S - flight path followed earth's surface Sound N/S Size N/S Shapo N/S Odor dotected N/S Apparent construction N/S Exhaust trails None Weather conditions N/S Effoct on clouds N/S Skotches or photographs None Manner of disappearance Over Norway Romarks: (over)
Official release, from the pursue collection. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 178 pages are in the text index: search them above, or from the library's search.