HMS M4
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HMS M4 was a British M class submarine of the Royal Navy built by Armstrong Whitworth, Newcastle Upon Tyne, being laid down in 1917. M4 was cancelled and sold as an incomplete hulk on 30 November 1921.
[edit] References
- Submarines, War Beneath The Waves, From 1776 To The Present Day, by Robert Hutchinson
- Colledge, J. J. and Warlow, Ben (2006). Ships of the Royal Navy: the complete record of all fighting ships of the Royal Navy, Rev. ed., London: Chatham. ISBN 9781861762818. OCLC 67375475.
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