![]() Originally a class of "motor minesweepers" (MS), "Y" was added to distinguish them from other minesweeper types sources disagree on whether "Y" stood for "yardcraft" – indicating a type of craft assigned for duty within a navy shipyard or naval base and not expected to go beyond waters adjacent to the base – or to indicate they were built by yacht-builders YMSs were built at 35 yacht yards, rather than at larger shipyards, 12 on the United States East Coast, 19 on the United States West Coast, and four in yards on the Great Lakes. A total of 561 were built at various U.S. The first wooden minesweeper of this class was to gain prominence in all theaters during World War II. From keel-laying to completion, the yard built YMS-1 in one year and three weeks. Launched on 10 January 1942, YMS-1 was completed two months later on 25 March 1942. Nevins Shipyard, Inc., at City Island, Bronx, designed the YMS and laid the keel of the first one, USS YMS-1, on 4 March 1941. The type proved successful and eventually became the basis for the AMS type of United States Navy minesweeper. The auxiliary motor minesweepers were originally designated yard minesweepers (YMS) and kept the abbreviation YMS after being re-designated. Īuxiliary motor minesweepers were small wood-hulled minesweepers commissioned by the United States Navy for service during World War II. T-522 served in the Soviet Navy until stricken in July 1956 and dismantled for spare parts. Secretly transferred to the Soviet Navy on during Project Hula, she became T-522 and took part in the Soviet conquest of the Japanese province of Karafuto on southern Sakhalin Island between 11 and 25 August 1945. Navy auxiliary motor minesweeper USS YMS-143 when new in February 1943.
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