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M Class (1918) SS 
Ships

Ship Pennant
No
Commissioned Decommission/
Loss
Note:

M1

M1
(ex K-18)

17-Apr-1918 12-Nov-1925 12in gun removed following signing of 1922 Washington Treaty. Sunk in collision with Swedish collier Vidar while diving off Start Point, Devon, 12-Nov-1925 with loss of all crew.

M2

M2
(ex K-19)

Apr-1920 26-Jan-1932 12in gun removed following signing of 1922 Washington Treaty. Converted to Aircraft Carrier end-1927. Failed to surface after dive in West Bay, off Portland 26-Jan-1932 with loss of all crew. Hangar flooded.

M3

M3
(ex K-20)

July-1920 Feb-1932 12in gun removed following signing of 1922 Washington Treaty. Converted to minelayer during refit 1927-28. Paid off and scrapped Feb-1932.

M4

M4
(ex K-21)

20-July-1919 (launched) n/a Cancelled Oct-1919 before completion.
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This page last edited - 05 March, 2013.

Copyright © Ian M King, except where otherwise indicated.