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Tuesday, 28 February 2023

Japanese small cruiser submarines I-54, I-56 and I-58 built early 1944

Displacement of 2,140 (standard)-2,607 (normal)-3,184 (emergency)-3,687 submerged tons and as dimensions 108.7 x 9.3 x 5.19 metres. Submerged endurance 35 hours/3 knots. Submergence depth 100 metres. Submergence time 60 seconds. Battery 11,200 AH-240-cells-240V. Engines 4 cycle 4,700 shp, Speed 17.7 (surfaced)-6,5 (submerged) knots. Range 21,000 nautical miles/16 knots. Armament 6 torpedo tubes (forwards) carried with them 1 plane and aft 4  Kaiten. Double hull of medium steel, riveted.

Source

U.S. Naval Technical Mission to Japan. Report S-01-1 Characteristics of Japanese naval vessels article 1 submarines. Dated January 1946.

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