38 48N123 16E Yellow Sea reported disc saucer observation — October 13, 1951

Accelerated and decelerated to maintain same interval between source and observer. The object, saucer-shaped, was observed visually and with binoculars. No exhaust or propulsion system was observed. The object accelerated rapidly and sped out of sight. No other aircraft or meteorological phenomena was observed. Naval vessel reported sighting an unidentified flying object. The object appeared to be stationary at first, then accelerated with tremendous speed and disappeared from sight within a few seconds. The image contains a photograph depicting a "Plan of Observation" and a "Vertical Diagram of Observation" related to an unidentified flying object (UFO) incident. SECRET UNCLASSIFIED 60' RED, -LAME The image contains a photograph of what appears to be a schematic or diagram of an unidentified flying object (UFO). Summary of events: A flight gunner, on lookout duty at an open waist hatch, sighted a light on the port side and notified the FD. The FD saw the light and brought the contact to the attention of the CO. The speed of the target was observed to be 200 knots (approximate).