"M" Class Submarine (1917)
Three of four projected "M" class submarine monitors were completed for the Royal Navy.
Only M 1 saw war service.
|Overview of 4 vessels|
|Citations for this data available on individual ship pages|
|M 1||Vickers||9 Jul, 1917||Collision 12 Nov, 1925|
|M 2||Vickers||19 Oct, 1918||Foundered 26 Jan, 1932|
|M 3||Armstrong, Whitworth & Company||19 Oct, 1918||Sold Feb, 1932|
|M 4||Armstrong, Whitworth & Company||20 Jul, 1919||Cancelled 1918|
- one 12-in 40 cal Mark IX, 50 shells
The 12-in gun could train 15 degrees to either side, elevate 20 degrees or depress 5 degrees.
It proved remarkably workable, and even after the war the British were considering how this might be preferable as an anti-submarine weapon to firing a spread of torpedoes. The submarine was able to transition from periscope depth to firing depth in 25 seconds, and to return to periscope depth after firing in 15 seconds.
M 1, M 2:
- four 18-in tubes forward, eight torpedoes
- four 21-in tubes forward, eight torpedoes
- The Technical History and Index, Vol. 3, Part 21. p. 8.
|"M" Class Submarine|
|M 1||M 2||M 3||M 4|
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