USS Deperm

USS Deperm (ADG-10) was a degaussing vessel of the United States Navy, named after the term deperm, a procedure for erasing the permanent magnetism from ships and submarines to camouflage them against magnetic detection vessels and enemy marine mines. Originally planned as a patrol craft escort (PCE-883), she was laid down in 1943, launched in 1944, and commissioned in 1945. She was subsequently redesignated a degaussing vessel, YDG-10, and named Deperm.

History
United States
Name	USS Deperm
Builder	Albina Engine and Machine Works, Portland
Laid down	1943
Launched	1944
Commissioned	1945
Reclassified	YDG-10
Stricken	21 February 1975
Fate	Sunk as a target, 22 September 1982
General characteristics
Type	Patrol Craft, Escort
Displacement	850 long tons (864 t)
Length	184 ft 6 in (56.24 m)
Beam	33 ft 1 in (10.08 m)
Draft	9 ft 5 in (2.87 m)
Propulsion	2 × General Motors 12-567A diesel engines, 2,900 hp (2,163 kW) each 2 shafts
Speed	15.7 knots (29.1 km/h; 18.1 mph)
Complement	99
Armament	1 × 3"/50 caliber gun 3 × twin 40 mm guns

Struck from the Naval Register 21 February 1975, Deperm was sunk as a target 22 September 1982 at 32°58′0″N 119°41′0″W. According to the available depth data in 2020, at this location the bottom is between 1250m and 1500m along the edge of a basin.[1]