M Class British Subs

Since 01-30-05

Originally ordered in 1916 as K-Class boats, these four were remodelled as larger craft (300 feet overall length, submerged displacement 1950 tons).

M1 (ex K18) was armed with one 12" gun: rammed and sunk by a merchant ship 12 November, 1925.

M2 (ex K19) carried on Parnall "Peto" seaplane; sank in West Bay, Portland, on 26 January, 1932.

M3 (ex K20) carried 100 mines; scrapped in 1939.

M4 (ex K21) was never completed.