HMS H12
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HMS H12 was a British H class submarine built by Fore River Yard, Quincy, Massachusetts. She was laid down on an unknown date and commissioned in 1915.
HMS H12 along with HMS H11 and HMS H13 to HMS H20 were all built in America but were interned by Washington until the USA entered World War I.
HMS H12 was sold in April 1920 in Dover.
[edit] References
Submarines, War Beneath The Waves, From 1776 To The Present Day, By Robert Hutchinson