History of YMS-427
YMS-427 was built by Mojean and Ericson, Tacoma, WA; keel laid down 4 November 1943; launched 27 March 1944; and commissioned 28 November 1944.
The wood-hulled YMS proved to be one of the United States Navy’s more durable and versarile type through a quarter-century of service, filling a variety of roles for a number of navies. All 481 ships of this type had the same general characteristics. The only significant variation within the type was one of appearance; YMS-1 through 134 had two stacks, YMS-135 through 445, 480, and 481 had one, while YMS-446 through 479 had none.
Originally rated as service craft, they were used during World War II for inshore sweeping to prepare the way for amphibious assaults. Surviving YMS’s were reclassified as AMS in 1947, given names, and rerated as mine warfare ships; in 1955 they received the new type symbol MSC(O), changed to MSCO in 1967. These ships bore much of the mine warfare burden in Korea, formed a major portion of our minecraft strength through the 1950’;, and provided underway training for Naval Reservists in the 1960’s.
YMS-427 was assigned to the 1 st Fleet in March 1945 serving in the assult and occupation of Okinawa Gunto 24 March-30 June 1945. From 9 September- 26 October 1945 YMS-427 served in the Nagoya (Honshu Area) and Sasebo (Kyushu-Korea Area). During the period of 27 October 1945 through 26 February 1946 she served in the Kure-Hiroshima (Honshu Area). In Auguat she was placed in deferred disposal status. YMS-427 was decommissioned 12 November 1946; listed as excess to the needs of the Navy. She was stricken from the a Naval Register 25 February 1947 and sold to the American Tug Boat Co., of Nordland, WA on 8 December 1947.
YMS
MOTOR MINESWEEPER
The wood-hulled YMS proved to be one of the U.S. Navy’s more
durable and versatile types through a quarter century of service, filling a
variety of roles for a number of navies. All 481 ships of this type had the same
general characteristics. The only significant variation within the type was one
of apperance. YMS-1 through 134 had two stacks. YMS-135 through 445, 480, and
481 had one, while YMS-446 through 479 had none. Originally rated as service
craft, they were used during World War II for inshore sweeping to prepare the
way for amphibious assaults. Surviving YMS’s were reclassified as AMS in 1947,
given names, and rerated mine warfare ships; in 1955 they received the new type
symbol MSC(O), changed to MSCO in 1967. These ships bore and provided underway
training for Naval Reservists in the 1960’s. Ruff (MSCO-54), originally
YMS-327, the last of its kind in U.S. service, was struck from the Navy List in
November 1969.
CLASS GROUPING
LIST
(Numbers in parentheses indicate units redesigned for
other uses before completion)
YMS-1 Class: 1-449 (450-452), 453-473, (474), 475,(476), 477- 479, (480),
481
CLASS STATISTCAL
SUMMARY
YMS-1 CLASS:
Engines: Type: Geared Diesels
YMS-1-481
Designed Shaft Horsepower:1000
Length Overall:136’
Propellers:2
Extreme Beam: 24’6’’ Maximum
Draft: 6’1’’
Full-Load Displacement:320 tons Designed
Accomodations: Off. 4, Enl.29
Designed Speed: 12k
Armament: (1) 3’’/50; (2) 20mm
YMS’s SUNK
DURING WWII
YMS 14: Collision; Boston Harbor, 11 Jan.
1945
YMS 19: Mine; off Palau, 24 Sept. 1944
YMS 21: Mine; off Toulon, 1 Sept. 1944
YMS 24: Mine; off St. Tropez, 15 Aug.
1944
YMS 30: Mine; off Anzio, 25 Jan. 1944
YMS 39: Mine; off Balikpapan, 26 June
1945
YMS 48: Shore batteries; Manila Bay, 14 Feb.
1945
YMS 50: Mine; off Balikpapan, 18 June
1945
YMS 70: Flounderd; off Leyte, 17 Oct.
1944
YMS 71: Mine; off Brunei, 3 Apr. 1945
YMS 84: Mine; off Balikpapan, 8 July
1945
YMS 103: Mine; off Okinawa, 8 Apr. 1945
YMS 133: Floundered; Coos Bay, OR, 21 Feb.
1943
YMS 304: Mine; Normandy, 30 July 1044
YMS 350: Mine; Normandy, 2 July, 1944
YMS 365: Mine; off Balikpapan, 26 June
1945
YMS 378: Mine; Normandy, 30 July 1944
YMS 385: Mine; Ulithi, 1 Oct. 1944
YMS 409: Floundered; N. Atlantic, 12 Sept.
1944
YMS 481: Shore batteries; Tarakan, Borneo, 2 May
1945
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