British Yard Mine Sweeper
BRITISH YARD MINE SWEEPERS
BYMS’s were built in the United States and transferred the Royal Navy under the Lend-lease Programme. “British Yard Mine Sweepers” are so called because they were built to the same design as the US Navy’s “Yard Mine Sweepers”.
Crews for the BYMS’s would sail to the United States, often on the Queen Mary, which could sail unescorted because of her greater speed, to collect their vessel. They would then have the formidable task of sailing their small vessel back across the Atlantic Ocean, often in winter.
MINE SWEEPING FLOTILLA: 169th MSF: 2050, 2064, 2152, 2154, 2255, 2277, 2278, 2284.
Based at: Dover.
Built by: San Diego Marine Construction Co., San Diego, California, USA (West Coast).
Laid down: 30 October 1942.
Launched: 17 February 1943.
Handed over to Royal Navy: 2 November 1943.
Returned to USA: 31 July 1946.
Wooden hull. Length, 130 feet. Beam, 25 feet 6 inches. Depth, 12 feet I inch. Draft, 8 foot 10.5 inches. Displacement 207-215 tons.
Engine: Two 800 bhp General Motors diesel engines.
Speed: 14.6 knots. 10 knots while sweeping. (Eight knots with double Oropesa sweeps)
Range: 2,500 at ten knots.
Compliment: 3 officers and 27 men.
Armament: One 3-inch HA/LA gun and two Oerlikon anti-aircraft guns.
BYMS’s were fitted with a drum on the stern with LL (double L) cables for sweeping magnetic mines, an acustic hammer on the bow for sweeping acustic mines and Oropesa floats for sweeping tethered mines.
All YMS and BYMS were built to the same design, the only variation was in the number of exhaust stacks. Minesweepers 1 to 134 had two sacks, 135 to 480 had one stack, 466 to 479 had no stacks.
2 November 1943, completed.
18 Feb 1944, Balboa, Panama Canal.
21 Feb 1944, Cristobal, Panama Canal.
4 to 9 March 1944, Bermuda.
17 and 18 March, 1944, Horta, Azores.
23 and 24 March, 1944, Londonderry, Northern Ireland.
25 to 27 March 1944, Milford Haven.
1 April 1944, Portsmouth.
2 April 1944, Dover.
9 Feb 1945, Dover.
9 and 10 Feb 1945, Harwich.
13 Feb to 4 April 1945, Aberdeen.
1 and 2 July 1945, Portsmouth.
3 July to 4 Sep 1945, Plymouth. On way to Gibraltar and on the S.E. Asia.
31 July 1946, returned to USA.
OFFICERS ON THE NAVY LIST, June 1943.
Not on Navy Lists.
OFFICERS ON THE NAVY LIST, June 1944.
Tempy. Lieut., C. J. Rose, 2 Nov 43 (In Command)
Tempy. Sub-Lieut., G. S. Kelting, 2 Nov 43.
Tempy. Sub-Lieut., G. T. Dickson, 23 Nov.
OFFICERS ON THE NAVY LIST, July 1945.
Tempy. Lieut., C. J. Rose 2 Nov 43, (In Command)
Tempy. Lieut., G. S. Kelting, 2 Nov 43.
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