Minesweeper of the United States Navy
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| History |
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 United States |
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| Name | USS Constant |
| Builder | Commercial Iron Works, Portland, Oregon |
| Laid down | 21 February 1942 |
| Launched | 9 May 1942 |
| Commissioned | 21 September 1942 |
| Renamed | USS PC-1590, 1 June 1944 |
| Decommissioned | 19 June 1946 |
| Recommissioned | 20 March 1951 |
| Decommissioned | 22 October 1954 |
| Fate | Sunk as a target ship |
| General characteristics |
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| Class and type | Adroit-class minesweeper |
| Displacement | 275 long tons (279 t) |
| Length | 173 ft 8 in (52.93 m) |
| Beam | 23 ft (7.0 m) |
| Draft | 7 ft 7 in (2.31 m) |
| Propulsion | |
| Speed | 18 knots (33 km/h) |
| Complement | 65 |
| Armament | |
USS Constant (AM-86) was an Adroit-class minesweeper of the United States Navy. Laid down on 21 February 1942 by the Commercial Iron Works, Portland, Oregon, and launched on 9 May 1942, the ship was commissioned on 21 September 1942.
World War II Pacific Theatre operations
From 20 December 1942 to 4 March 1943 Constant escorted convoys between San Francisco, California, and Pearl Harbor. She sailed from Pearl Harbor 8 March for Espiritu Santo, arriving 25 March for local escort duty, operating from Espiritu Santo and Noumea in support of the Guadalcanal operation.
On 3 September 1943 she arrived at Tulagi and remained in the Solomons on inter-island escort and minesweeping duty with occasional convoy voyages to Nouméa and Espiritu Santo until 3 April 1944, when she steamed to Auckland, New Zealand, for a brief overhaul. She returned to Port Purvis on Florida Island in the Solomons 13 May.
Reclassified as a submarine chaser
On 1 June 1944 her name was canceled and she was reclassified as a submarine chaser PC-1590. She continued her service at Espiritu Santo, Nouméa, Samoa and Tongatapu until 6 May 1946.
Post-war activity
She then returned to Pearl Harbor, where she was decommissioned 19 June 1946. Assigned to the 14th Naval District for Naval Reserve training 28 October 1946, PC-1590 was placed in commission in reserve 5 May 1950, and in full commission from 20 March 1951 until decommissioned 22 October 1954. She was sunk as a target.