TYNE BUILT SHIPS
  A history of Tyne shipbuilders and the ships that they built

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Name: M 4
Type: Submarine Monitor
Keel: 08/12/1916
Launched: 28/07/1919
Completed: n/a
Builder: Armstrong, Whitworth & Co
Yard: High Walker
Yard Number: 911
Dimensions: 1600disp surf, 1950disp subm, 290.0 x 24.7 x 15.75ft
Engines: 2 x 2400bhp oil engines, 2 x 1600hp electric motors
Engines by: Possibly by Armstrong, Whitworth
Propulsion: 2 x Screws, 9.5knots
Construction: Steel
Armament: 1 x 12.0ins, 1 x 3.0ins AA guns; 4 x 12.0ins bow torpedoes
History:
30/11/1921 Armstrong, Whitworth & Co
30/11/1921 Broken up
Comments: 08/12/1916: Laid down for the British Royal Navy
Ordered as a K class submarine, to be named K21
1917: Renamed M4
26/11/1918: Order cancelled
28/07/1919: Launched to clear the slipway
30/11/1921: Sold to Armstrong, Whitworth & Co for beaking up