USS Gyatt Destroyer USO Encounter 1958

On September 20, 1958, USS Gyatt (DDG-1) — the Navy's first guided missile destroyer — was operating in the Atlantic when sonar operators detected a high-speed submerged contact performing maneuvers impossible for any known submarine. The contact approached the destroyer at speeds estimated at 200+ knots underwater, circled the vessel, then accelerated toward the surface. What emerged was a disc-shaped metallic craft that hovered briefly before departing aerially at extreme speed. The complete sea-to-air transition was observed by bridge personnel and tracked by the ship's combat systems. Caribbean Fleet Command was notified via OPREP flash message. The Office of Naval Intelligence incorporated the Gyatt report as one of the foundational entries in its classified USO database, which had been growing since the late 1940s as naval vessels globally reported similar transmedium contacts. The Gyatt case was notable given the ship's advanced sensor suite — the guided missile destroyer had more sophisticated detection equipment than almost any other surface vessel of the era.