Grampus Class Submarine (1932)

Britain's built six Grampus or Porpoise Class Minelaying Submarines in the 1930s.

Overview of 6 vessels
Citations for this data available on individual ship pages
Name	Builder	Laid Down	Launched	Completed	Fate
Porpoise	Vickers-Armstrongs	22 Sep, 1931	30 Aug, 1932	11 Mar, 1933	Sunk 16 Jan, 1945
Grampus	Chatham Royal Dockyard	20 Aug, 1934	25 Feb, 1936	10 Mar, 1937	Sunk 16 Jun, 1940
Narwhal	Vickers-Armstrongs	29 May, 1934	29 Aug, 1935	28 Feb, 1936	Sunk 23 Jul, 1940
Rorqual	Vickers-Armstrongs	1 May, 1935	27 Jul, 1936	10 Feb, 1937	Sold 19 Nov, 1945
Cachalot	Scotts Shipbuilding and Engineering Company	12 May, 1936	2 Dec, 1937	15 Aug, 1938	Sunk 30 Jul, 1941
Seal	Chatham Royal Dockyard	9 Dec, 1936	27 Sep, 1938	24 May, 1939	Captured 5 May, 1940

Armament

• six 21-in torpedo tubes forward with 12 torpedoes
• one QF Mark XII 4-in gun
• fifty mines

See Also

• Wikipedia

Bibliography

• Chesneau, Roger (editor) (1980). Conway's All the World's Fighting Ships 1922–1946. London: Conway Maritime Press. (on Amazon.com and Amazon.co.uk).