39.9N 152.6E (pacific), June 1963June 1963

On June 16, 1963, at 11:20 a.m. GMT (Greenwich Mean Time), the crew of the USS Tetela and the Coast Guard Cutter Chautauqua reported observing a flying object in the North Pacific Ocean at coordinates 39.9 North, 152.6 East. The object emitted an irregular flashing light and did not appear to be on a straight course. It passed over the zenith, or highest point, of the observers' position as it traveled from west to east at very high altitude.

The initial Navy and Coast Guard report was brief and prompted no detailed investigation from military observers on the scene. The object's characteristics, its irregular flashing, non-linear flight path, and high altitude, were documented in official cables sent to the U.S. Air Force, the Naval Intelligence command, and other military authorities. However, the file notes that "no evaluation" was made at that time.

Subsequent pages in the file shift to unrelated sightings in Ohio and California from the same month, along with what appear to be detailed observational logs, weather data, and witness questionnaires for those cases. The original Pacific sighting appears to stand alone with minimal analysis or conclusion recorded.

The Air Force determined this case to be "unknown." The full case file, comprising 26 pages as held by the National Archives, is reproduced below.