|Name||Edwin H. Duff|
|Namesake||Edwin H. Duff|
|Owner||War Shipping Administration (WSA)|
|Operator||McCormack Steamship Co.|
|Ordered||as type (EC2-S-C5) hull, MC hull 3142|
|Builder||J.A. Jones Construction, Panama City, Florida|
|Laid down||18 May 1945|
|Launched||29 June 1945|
|Sponsored by||Mrs. Edwin H. Duff|
|Completed||27 July 1945|
|Namesake||One who prohibits|
|Commissioned||7 April 1958|
|Decommissioned||5 August 1965|
|Reclassified||Guardian-class radar picket ship|
|Refit||Charleston Naval Shipyard, Charleston, South Carolina|
|Stricken||1 September 1965|
|General characteristics |
|Class and type|
|Beam||57 feet (17 m)|
|Draft||27 ft 9.25 in (8.4646 m)|
|Speed||11.5 knots (21.3 km/h; 13.2 mph)|
|Capacity||490,000 cubic feet (13,875 m3) (bale)|
|General characteristics (US Navy refit)|
|Class and type||Guardian-class radar picket ship|
|Armament||2 × 3 inches (76 mm)/50 caliber guns|
USS Interdictor (AGR/YAGR-13) was a Guardian-class radar picket ship, converted from a Liberty ship, acquired by the US Navy in 1954. She was reconfigured as a radar picket ship and assigned to radar picket duty in the North Pacific Ocean as part of the Distant Early Warning Line.
Interdictor (YAGR-13) was laid down on 18 May 1945, under a Maritime Commission (MARCOM) contract, MC hull 3142, as the Liberty ship Edwin H. Duff, by J.A. Jones Construction, Panama City, Florida. She was launched 29 June 1945; sponsored by Mrs. Edwin S. Duff; and delivered 27 July 1945, to the McCormack Steamship Co.
She carried aircraft until entering the James River Reserve Fleet, Lee Hall, Virginia, 17 October 1945. Except for brief cargo service, she remained there until being acquired by the US Navy, 10 May 1957.
She was converted to a radar picket ship at the Charleston Navy Yard, Charleston, South Carolina, and commissioned Interdictor (YAGR-13), 7 April 1958, Lieutenant Commander Joseph Palmer Dordahl, USNR, in command.
Fitted with the latest and best electronic search and tracking equipment, Interdictor sailed 2 May 1958, for shakedown training in the Caribbean. She departed Charleston, 18 July 1958, and sailed to her new home port, San Francisco, California.
Arriving 13 August, the ship assumed her role as an ocean radar station ship, part of America's vast early warning defense system. Operating with search aircraft, Interdictor could detect, track, and report enemy aircraft at great distances, supplementing land-based radar stations, and controlling high-speed interceptor aircraft in case of attack. She also carried out weather reporting duties during her three to four week cruises in the Pacific Ocean.
Interdictor's hull classification was changed 28 September 1958, to AGR-13. She continued on radar picket patrols for the Continental Air Defense Command (CONAD) out of San Francisco, until decommissioned 5 August 1965.
Her name was struck from the Navy Directory 1 September 1965, when she transferred to the US Maritime Administration (MARAD) for lay-up in the Suisun Bay Reserve Fleet, Suisun Bay, California, where she remained until she was sold 13 June 1974. Her subsequent fate is not known.
Interdictor's crew was eligible for the following medals: