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M Class (1918) SS Specification 

M1- 3 as Built

Crew :

64.
(M2 - 55 after conversion to aircraft carrier including 2 RAF officers.).
To M Class (1918) SS Ships :
Displacement : 1,594 tons surfaced.
1,946 tons submerged.

Dimensions :

295ft 9in length x 20ft 4in beam;
(90.1m x 6.2m).
Range : 4,500 nm @ 10 kts surfaced;
80 nm @ 2 kts submerged.

Diving depth :

200ft.
Armament : 1 x 12in, 35 calibre Mk IX gun, 50 rounds;
1 x 3in Mk2 High Angle AA gun;
4 x 18in torpedo tubes, 4 reloads;
Parnall Peto seaplane (M2). 
Power plant : 2 x 1,200hp diesel;
2 x 800hp electric;
Twin screws.

Max Speed :

15 kts surface;
8.5 kts dived.
M3 as converted to Minelayer

Crew :

60 To M Class (1918) SS Ships :
Displacement : 1,670 tons surfaced;
2,006 submerged.

Dimensions :

295ft 9in length x 20ft 4in beam;
(90.1m x 6.2m).
Range : 4,500 nm @ 10 kts surfaced;
80 nm @ 2 kts submerged.

Diving depth :

200ft.
Armament : 100 type B mines;
1 x 3in Mk2 High Angle AA gun;
4 x 18in torpedo tubes, 4 reloads.
Power plant : 2 x 1,200hp diesel;
2 x 800hp electric;
Twin screws.

Max Speed :

15 kts surface;
8.5 kts dived.
This page last edited - 05 March, 2013.

Copyright © Ian M King, except where otherwise indicated.