USS Gyatt and Navy F-8C Radar-Visual Encounter (Puerto Rico, 1964)

Background

In mid-November 1964 the US Navy destroyer USS Gyatt was conducting training exercises in the Atlantic about 220 miles northwest of Puerto Rico. According to a secondary compilation on the UAP Discovery forum, the ship had been picking up IFF-coded anomalous targets on radar between 16 and 18 November, and no other aircraft were known to be in the training area. The case is catalogued in the Blue Book Unknowns, as cited by that compilation.

The encounter

On the evening of 19 November 1964 (local time; a Foreign Technology Division document gives the primary incident time as 20 November, 01:12 UTC), the Gyatt's radar picked up a target approaching from the northeast. The ship relayed the contact to Roosevelt Roads Naval Station, which directed a Utility Squadron Eight (VU-8) F-8C to investigate. The pilot, identified in the FTD document as Lt. Cdr. K. H. Woodbury, reported a dark, delta-shaped object roughly the size of an F-4, at around 30,000 to 35,000 feet and then 50,000 feet or more. He described no contrail or lights, except a light at the tail during acceleration, and said he could not close with it. The Gyatt's radar was briefly jammed during the contact, and the FTD document records about 21 minutes of tracking. Radar contacts are also logged on several days in the same week, with a final encounter in the Caribbean on 24 November.

The squadron commander, T. D. Fosdick, is quoted in the forum compilation saying the object's speed, acceleration, and ceiling exceeded anything he had seen, and that there was "no reasonable explanation for this target." That statement is not in the official document, so it should be read as the compilation's account.

Official assessment and dispute

The FTD document's preliminary analysis concluded that the object "IS NOT A UFO BUT AN UNIDENTIFIED A/C", meaning an unidentified aircraft. The main point of disagreement is speed. The pilot's initial report, as recorded in the FTD document, put the object above Mach 3 (about 3,800 knots). The FTD's analysis of the radar scope photographs put the speed at no more than about 1,515 knots. The forum compilation gives a different account again, saying the object exceeded Mach 1 and climbed past 50,000 feet. The FTD document's AI-generated summary on UFOScans suggests the high figure came from a misreading of the radar scope's timing, but that explanation does not appear in the official text, so it is not adopted here.

A declassified memo to the Assistant Director for Special Activities, also hosted on UFOScans, confirms valid radar tracks and visual observations of unidentified aircraft on 15, 17, 18, 19, and 24 November 1964, and quotes the pilot describing a delta shape about the size of a jet fighter. That memo's dating is inconsistent on its own page, and its location is redacted, so it corroborates the week of activity but not the exact link to the Gyatt.

The source base is thin. The core documents are summaries of declassified files, and the forum compilation relies on secondary works (Sparks's Blue Book Unknowns catalogue, Rullan's 2002 study of ship reports, and Powell's 2024 book) that were not read directly for this entry.

Why it matters

The case is cited in discussions of ship-based radar-visual reports because it combines a naval radar track with a trained pilot's visual sighting. It also shows how Project Blue Book and the FTD treated a case that was publicly described as "unexplained" but officially closed as an unidentified aircraft. Because the speed figures conflict and the primary files are not fully available online, the case stays contested. A closer reading of the FTD file, the Blue Book Unknowns catalogue, and the Rullan paper would be needed before drawing firm conclusions about the target's speed or nature.