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fighting ships of the world

ROYAL NAVY - UNITED KINGDOM

SUBMARINES

SWORDFISH submarines (1932 - 1933)

     

Swordfish 1939

Name No Builder Laid down Launched Comp Fate
Sturgeon S73 - N73 Chatham DYd 1/1931 8/1/1932 2/1933 to Netherlands 10/1943 - 9/1945 (Zeehond), BU 1/1946
Swordfish S61 Chatham DYd 12/1930 10/11/1931 11/1932 sunk 11/1940
Seahorse S98 Chatham DYd 9/1931 15/11/1932 10/1933 sunk 7/1/1940
Starfish S19 Chatham DYd 9/1931 14/3/1933 10/1933 sunk 9/1/1940

 

Displacement standard, t

640

Displacement normal, t

730 / 927

Length, m

61.7

Breadth, m

7.32

Draught, m

3.63

No of shafts

2

Machinery

2 Admiralty diesels / 2 electric motors

Power, h. p.

1550 / 1440

Max speed, kn

13.75 / 10

Fuel, t

diesel oil 44

Endurance, nm(kts)

3800(10) /

Armament

Sturgeon, Swordfish: 6 - 533 TT (bow, 12), 1 x 1 - 76/45 20cwt QF Mk II (HA), 1 x 1 - 12.7/62

Seahorse, Starfish: 6 - 533 TT (bow, 12), 1 x 1 - 76/45 20cwt QF Mk II, 1 x 1 - 12.7/62

Sensors sonar

Complement

38

Diving depth operational, m 60

Ship project history: In 1930, according to the plan of update of underwater forces, Admiralty has made a decision to start building submarines for replacing of the become outdated "" class. New boats should have medium dimensions, speed, armament and endurance, exceeding corresponding "" class indicators, but at the same time comparable with latter on manoeuvrability and a rate of diving. The design of new "S" class had approved the same year and building of 4 boats was started under 1929 and 1930 programs.

Submarines were saddle-tank type, with fuel tanks inside pressure hull, operational diving depth was 95m. Diving time was 25-30sec. Swordfish and Sturgeon differed by original folding into "sounding tube", 76mm gun mounting. Latter had appeared unsuccessful and was soon been changed on standard not retracted one.

Modernizations: None

1/1946, Sturgeon: 1 x 1 - 76/45 CP Mk V, 6 - 533 TT

Naval service: Seahorse was lost on a mine in the North Sea (possibly 7/1/1940). Starfish was sunk 9/1/1940 by DCs of German minesweeper 7 in the North Sea. Swordfish was lost 16/11/1940 on a mine in the North Sea.

Sturgeon 1933

Ivan Gogin, 2008-10