|Builders:||35 yacht builders|
|In commission:||about March 1942 - 13 December 1957|
|Cancelled:||YMS-482 – YMS-500|
|Length:||136 ft (41 m)|
|Beam:||24 ft 6 in (7.47 m)|
|Draft:||8 ft (2.4 m)|
|Speed:||15 knots (28 km/h)|
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.
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.
There were two mostly cosmetic sub-types of the class, sometimes referred to as classes themselves
This subclass was identical but had only one stack rather than two, and consisted of YMS-135–YMS-445, YMS-480, and YMS-481.
This subclass was also identical but had no stacks, and comprised YMS 446–YMS 479.
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.
France received 31 YMS-class minesweepers during World War 2, with one (D202, formerly YMS-77) being sunk by a mine in 1944. France kept its YMS-class ships in service after the end of the war, with seven remaining in service in 1962, used as training ships in the École Navale and as experimental vessels. Three ships of the class were transferred from France to South Vietnam in 1954, while another was transferred to Madagascar in 1961.
- USS Barbet (AMS-41)(YMS-45)
- USS YMS-61
- USS Albatross (AMS-1)(YMS-80)
- USS Brambling (AMS-42)(YMS-109)
- USS Brant (AMS-43)(YMS-113)
- USS Crossbill (AMS-45)(YMS-120)
- USS Bobolink (AMS-2)(YMS-164)
- USS Cardinal (AMS-4)(YMS-179)
- USS Fulmar (AMS-47)(YMS-193)
- USS Courser (AMS-6)(YMS-201)
- HMS BYMS-2203 (J1003)(YMS-203)
- USS Crow (AMS-7)(YMS-215)
- USS Curlew (AMS-8) (YMS-218)
- USS Flicker (AMS-9)(YMS-219)
- USS Firecrest (AMS-10)(YMS-231)
- USS Flamingo (AMS-11)(YMS-238)
- USS Harkness (AMCU-12)(YMS-242)
- USS James M. Gilliss (AMCU-13)(YMS-262)
- USS Lapwing (AMS-48)(YMS-268)
- USS Lorikeet (AMS-49)(YMS-271)
- HMS BYMS-2282 (YMS-282)
- USS Reedbird (AMS-51)(YMS-291)
- USS Rhea (AMS-52)(YMS-299)
- USS Robin (AMS-53)(YMS-311)
- USS Grackle (AMS-13)(YMS-312)
- USS Grouse (AMS-15) (YMS-321)
- USS Plover (AMS-33)(YMS-442)
- USS Redhead (AMS-34)(YMS-443)
- USS Hawk (AMS-17)(YMS-362)
- USS Hornbill (AMS-19)(YMS-371)
- USS Hummer (AMS-20)(YMS-372)
- USS Jackdaw (AMS-21)(YMS-373)
- USS Kite (AMS-22)(YMS-374)
- USS Lark (AMS-23)(YMS-376)
- USS YMS-386
- USS Seagull (AMS-55)(YMS-402)
- USS Chatterer (AMS-40)(YMS-415)
- USS YMS-418
- USS Mockingbird (AMS-27)(YMS-419)
- USS Siskin (AMS-58) (YMS-425)
- USS Ostrich (AMS-29)(YMS-430)
- USS Parrakeet (AMS-30)(YMS-434)
- USS Partridge (AMS-31)(YMS-437)
- USS Pelican (AMS-32)(YMS-441)
- USS Turkey (AMS-56)(YMS-444)
- USS Sanderling (AMCU-49)(YMS-446)
- USS McMinnville (PCS-1401)(YMS-452)
- USS Swan (AMS-37)(YMS-470)
- USS Verdin (YMS-471)
- USS Waxbill (MHC-50)(YMS-479)
- USS Swallow (AMS-36)(YMS-1416)
- 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. Retrieved 20 December 2007.)
- Masson 1969, pp. 59, 61–53.
- Blackman 1962, p. 94.
- This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.
- Blackman, Raymond V. B. (1962). Jane's Fighting Ships 1962–63. London: Sampson Low, Marston & Co. Ltd.
- Le Masson, Henri (1969). Navies of the Second World War: The French Navy Volume Two. London: Macdonald & Co.
- Priolo, Gary P. (2006). "Auxiliary Motor Minesweeper (YMS), British Motor Minesweeper (BYMS) Index". NavSource Online. NavSource Naval History. Retrieved 19 December 2007.