User:Freight67/sandbox

Origin
In March 1941 the first of the wooden YMS Class Auxiliary Motor Minesweeper's keels was laid down in the Henry B. Nevins, Inc. Shipyard in City Island, NY. USA. This was to be the first of its class of a total of 561 produced and numbered YMS-1 through to YMS-481. "YMS" representing "Yard MineSweeper"  The term "Yard" was added to distinguish them from other classes of minesweeper as the US Navy did not expect them to go beyond adjacent waters from their base or Naval "Yard". These were also built at yacht yards, rather than the larger shipyards.

Inclusive of the 561 produced were 80 which were specifically destined to be transferred to the United Kingdom under the lend lease agreement during the Second World War and designated the numbers BYMS-1 to BYMS-80. The "B" representing "British". On receipt of the 80 BYMS by the United Kingdom, they were given the pennant numbers by the Royal Navy as HMS J-801 to HMS J-880. The "J" representing "Minesweeper" and then subsequently renumbered to HMS BYMS 2001 to HMS BYMS 2080. The United Kingdom during the course of the Second World War received a further 70 ships which were not built specifically for them, but taken from or started life as 70 of the original YMS built.

Design
All the ships in the YMS/BYMS Class were 136 ft in length, with a beam of 24 ft and a draft of 8 ft. The ship had an overall displacement of 270 tonnes. The ships had a top speed of 15 kn.