HMS Holland 6
Holland 6 was originally a Holland-class submarine. But Holland 6 had many improvements made to her, and she was classed as the first of a class of 13 boats called the British A-class submarine.
See HMS A1 for details of her career in the Royal Navy.
- Submarines, War Beneath The Waves, From 1776 To The Present Day, by Robert Hutchinson.
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