USS Impervious (MSO-449)
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| History | |
|---|---|
 United States
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| Builder: | Martinolich Shipbuilding Co., San Diego, California |
| Laid down: | 18 November 1951 |
| Launched: | 29 August 1952 |
| Commissioned: | 15 July 1954 |
| Decommissioned: | 12 December 1991 |
| Reclassified: | MSO-449 on 7 February 1955 |
| Struck: | 18 March 1992 |
| Homeport: | Long Beach, California |
| Fate: | scrapped, 4 December 2000 |
| General characteristics | |
| Class and type: | Agile class minesweeper |
| Displacement: | 620 tons |
| Length: | 172 ft (52.43 m) |
| Beam: | 36 ft (10.97 m) |
| Draught: | 10 ft (3.05 m) |
| Propulsion: | Four Packard ID1700 diesel engines, two shafts, two controllable pitch propellers |
| Speed: | 16 knots |
| Complement: | 74 |
| Armament: | one 40mm mount |
USS Impervious (AM-449/MSO-449) was an Agile-class minesweeper acquired by the U.S. Navy for the task of removing mines that had been placed in the water to prevent the safe passage of ships.
Impervious was launched by Martinolich Shipbuilding Co., San Diego, California, 29 August 1952; sponsored by Miss Mary Lin Moore; and commissioned 15 July 1954, Lt. Comdr. A. T. Ford in command.
Following shakedown and mine warfare training off the California coast, Impervious was reclassified MSO-449 on 7 February 1955. She sailed 1 July with her division for duty in the Far East with the U.S. 7th Fleet, arriving Sasebo via Pearl Harbor 5 August. During this deployment, she operated with ships of the Republic of Korea Navy and visited Taiwan before returning to her home port, Long Beach, 15 February 1956. During the next two years she operated out of Long Beach.
Impervious sailed for her second U.S. 7th Fleet deployment 3 January 1958, and during the next 6 months trained in Japanese waters. She also helped train Nationalist Chinese crews during April and May, preparing them to help to preserve the freedom and independence of Taiwan. The minesweeper returned to Long Beach 15 July 1958, and during September took part in a giant amphibious exercise off Camp Pendleton, California.
In April 1959 Impervious interrupted her regular training schedule to take part in a joint mine warfare exercise with Canadian ships, and spent the rest of the year on training exercises in California waters. In early 1960 the ship prepared for another deployment to the Far East, sailing 3 May for Japan. During August she participated in maneuvers with Korean and Nationalist Chinese ships, and in October Impervious operated with units of the Philippine Navy in similar operations off Corregidor. She sailed via Guam and Pearl Harbor to Long Beach, arriving 16 November.
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