HMS H21

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HMS H21 was a British H class submarine built by Vickers Barrow-in-Furness as the first of the Batch 3 H class submarines. She was laid down on 20 October 1917 and was commissioned on 28 January 1918.

H21 was an improved design of the H class which produced a larger displacement and the latest 21 inch torpedo tubes replacing the old 18 inch torpedo tubes. This would be incorporated into all batch 3 H class submarines.

HMS H21 was sold on 13 July 1926 at Newport.

[edit] References

  • Submarines, War Beneath The Waves, From 1776 To The Present Day, by Robert Hutchinson.


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