USS Yorktown (CVS-10) in a posed formation with her escorts and some of her aircraft during Exercise Sea Imp, in 1966.

The U.S. Navy aircraft carrier USS Yorktown (CVS-10) in a posed formation with her escorts and some of her aircraft during Exercise Sea Imp, a major Southeast Asia Treaty Organization exercise conducted in the Western Pacific during the first part of 1966. The escorts are the guided missile destroyer USS Goldsborough (DDG-20) and the destroyers USS Taylor (DD-468) and USS Jenkins (DD-447) at left. The destroyer escort USS Bronstein (DE-1037) leads USS Hooper (DE-1026) and USS Bridget (DE-1024). Planes overhead include Grumman S-2E Trackers of Anit-Submarine Squadron 23 (VS-23) "Black Cats" and VS-25 "Golden Eagles", a Grumman E-1B Tracer of Carrier Airborne Warning Squadron 11 Det.T "Early Eleven" and Sikorsky SH-3A Sea Kings from Helicopter Anti-Submarine Squadron 4 (HS-4) "Black Knights". All squadrons were assigned to Carrier Anti-Submarine Air Group 55 (CVSG-55) aboard the Yorktown for a deployment to the Western Pacific and Vietnam from 5 January to 27 July 1966.