HM Ships from As extracted from Jane's Fighting Ships for 1919

Index

Summary and Table
"R" Class
"M" Class
"L" Class
"K" Class
"J" Class
"H" Class
"G" Class
"F" Class
"E" Class

As extracted from Jane's Fighting Ships © for 1919

British Navy - Submarines

M Class Submarine Monitors - 1 Completed.- 3 Completing = 4 ?

Page 119

M 1 Photo, M. Davidson, Esq.

M 1 ex K18 (1918), M 2 ex K 19 (----), both by Vickers.
M 3 ex K 20 (----), M 4 ex K 21 (----), both by Armstrong Whitworth.

Launching dates of M 2 - 4 not reported; these three boats may not be finished.

Few details available. Designed by Admiralty; reported to be double-hulled type. Dimensions : about 200 x 20 x 10 feet.
Guns : 1 - 12 inch, 35 cal., 1 - 3 inch AA.
Machinery: Type not known, but reported to be Diesel engines. Oil fuel: ?? tons. Other details as Table.

Gunnery Notes.- 12 inch believed to be one of those removed from old Majestic Class of Battleships, firing a 520 lb projectile. No turntable, but high-angle elevation. Reported that gun is loaded and laid to high angle elevation; then boat is dived to about 12 - 20 feet, leaving muzzle of 12 inch gun above water, and periscopes. There is a bead sight on gun-muzzle, so that gun can be sighted by periscope and fired when running at shallow submersion. To re-load, it is necessary to return to surface.

General Notes.- Begun under War Emergency Programme. These "Submarine Monitors" are a unique design, but reports are not available of M 1's performance during War, so that their practical worth is a matter of conjecture.

Source: As extracted from Jane's Fighting Ships for 1919 - Page 119

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