Military Wiki
Advertisement
YMS-1-class minesweeper
USS YMS-324 in San Francisco Bay, c. 1945–46
USS YMS-324 in San Francisco Bay, c. 1945–46
Class overview
Name: YMS-1
Builders: 35 yacht builders[1]
Operators:  United States Navy
 Royal Navy
 Royal Canadian Navy
Subclasses: YMS-136, YMS-446
In commission: about March 1942[1] - 13 December 1957[2]
Completed: 481[1]
Cancelled: YMS-482YMS-500
Active: 0
Lost: 32[3]
General characteristics
Type: Minesweeper
Displacement: 270 tons
Length: 136 ft (41 m)
Beam: 24 ft 6 in (7.47 m)
Draft: 8 ft (2.4 m)
Propulsion: 2 × 880 bhp (660 kW) General Motors 8-268A diesel engines
2 shafts
Speed: 15 knots (28 km/h)
Complement: 32
Armament: 1 × 3-inch/50 caliber gun mount
2 × 20 mm guns
2 × depth charge projectors

The YMS-1 class of auxiliary motor minesweepers was established with the laying down of YMS-1 on 4 March 1941. Some were later transferred to the United Kingdom as part of the Second World War Lend-Lease pact between the two nations. One ship, eventually made its way into the Royal Canadian Navy postwar.

Design

The design for the class had a displacement of 270 tonnes. The ships had a length of 136 feet (41 m) a beam of 24 ft 6 in (7.47 m), and a draft of 8 ft (2.4 m). The vessels were capable of 15 knots (28 km/h; 17 mph) , being powered by two 440 shp (330 kW) General Motors (Cleveland) 8-268A, 2-cycle diesel engines which drove two shafts.

The ships had a complement of 32. Their armament comprised one single 3-inch/50 caliber gun mount, two 20 mm anti-aircraft guns and two depth charge projectors.

Subclasses

There were two mostly cosmetic sub-types of the class, sometimes referred to as classes themselves

YMS-135 subclass

This subclass was identical but had only one stack rather than two, and consisted of YMS-135YMS-445, YMS-480, and YMS-481.

YMS-446 subclass

This subclass was also identical but had no stacks, and comprised YMS 446YMS 479.

BYMS

Eighty vessels of the class were ordered from US yards for transfer under Lend-Lease to the United Kingdom as the BYMS-class minesweeper. Another 53 built for the US Navy (hull numbers 137 to 284) were transferred as further BYMS and another 17 were delivered later.

Examples

Survivors

  • MV Uchuck III, Merchant vessel, USS YMS-123

References

  1. 1.0 1.1 1.2 Priolo, Gary P. (2006). "Auxiliary Motor Minesweeper (YMS), British Motor Minesweeper (BYMS) Index". NavSource Online. NavSource Naval History. http://www.navsource.org/archives/11/19idx.htm. Retrieved 2007-12-20. 
  2. Radigan, Joseph M. (2006). "Ruff (MSC[O] 54), ex-AMS-54, ex-YMS-327". NavSource Online. NavSource Naval History. http://www.navsource.org/archives/11/19327.htm. Retrieved 2007-12-20. 
  3. For both YMS-1 and BYMS classes a total 40 were lost. Of those 40, 32 were YMS-1 class. (See: "YMS class Minesweepers". Uboat.net. http://uboat.net/allies/warships/class.html?ID=477. Retrieved 2007-12-20. )

External links

This page uses Creative Commons Licensed content from Wikipedia (view authors).
Advertisement