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Japanese submarine I-55 (1943)

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Title: Japanese submarine I-55 (1943)  
Author: World Heritage Encyclopedia
Language: English
Subject: I-52-class submarine (1942), World War II shipwrecks in the Philippine Sea, Japanese submarines lost during World War II, List of Japanese Navy ships and war vessels in World War II
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Japanese submarine I-55 (1943)

Empire of Japan
Name: I-55
Commissioned: April 20, 1944
Fate: Disputed (see article)
General characteristics
Class & type: Type C3 submarine
  • 2,605 tonnes (2,564 long tons) surfaced
  • 3,702 tonnes (3,644 long tons) submerged
Length: 108.7 m (356 ft 8 in) overall
Beam: 9.3 m (30 ft 6 in)
Draft: 5.1 m (16 ft 9 in)
Installed power:
  • 17.7 knots (32.8 km/h; 20.4 mph) surfaced
  • 6.5 knots (12.0 km/h; 7.5 mph) submerged
  • 27,000 nmi (50,000 km; 31,000 mi) at 12 knots (22 km/h; 14 mph) surfaced
  • 105 nmi (194 km; 121 mi) at 3 knots (5.6 km/h; 3.5 mph) submerged
Test depth: 100 m (330 ft)
Crew: 94

The Japanese submarine I-255 was one of three Type C cruiser submarines of the C3 sub-class built for the Imperial Japanese Navy (IJN) during the 1940s.


  • Design and description 1
  • Construction and career 2
  • Notes 3
  • References 4
  • External links 5

Design and description

The Type C3 submarines were derived from the earlier C2 sub-class although with fewer torpedo tubes, an additional deck gun, and less-powerful engines to extend their range. They displaced 2,605 tonnes (2,564 long tons) surfaced and 3,702 tonnes (3,644 long tons) submerged. The submarines were 108.7 meters (356 ft 8 in) long, had a beam of 9.3 meters (30 ft 6 in) and a draft of 5.1 meters (16 ft 9 in). They had a diving depth of 100 meters (330 ft).[1]

For surface running, the boats were powered by two 2,350-brake-horsepower (1,752 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 600-horsepower (447 kW) electric motor. They could reach 17.7 knots (32.8 km/h; 20.4 mph) on the surface and 6.5 knots (12.0 km/h; 7.5 mph) underwater.[2] On the surface, the C3s had a range of 27,000 nautical miles (50,000 km; 31,000 mi) at 12 knots (22 km/h; 14 mph); submerged, they had a range of 105 nmi (194 km; 121 mi) at 3 knots (5.6 km/h; 3.5 mph).[3]

The boats were armed with six internal bow 53.3 cm (21.0 in) torpedo tubes and carried a total of 19 torpedoes. They were also armed with two 14 cm (5.5 in) deck guns and one twin mount for 25 mm (1 in) Type 96 anti-aircraft guns.[3]

Construction and career

Assigned to the defense of the Marianas, during a mission to rescue staff of the 1st Air Fleet on Tinian, she was presumably found and sunk by the USS Gilmer and USS William C. Miller on 14 July 1944, though some sources claim this sinking was actually the Ro-48.

See also USS Wyman and USS Reynolds references to the sinking of this submarine in which Wyman claims credit for this sinking on 28 July 1944.


  1. ^ Bagnasco, p. 192
  2. ^ Chesneau, p. 201
  3. ^ a b Carpenter & Dorr, p. 110


  • Bagnasco, Erminio (1977). Submarines of World War Two. Annapolis, Maryland: Naval Institute Press.  
  • Boyd, Carl & Yoshida, Akikiko (2002). The Japanese Submarine Force and World War II. Annapolis, Maryland: Naval Institute Press.  
  • Carpenter, Dorr B. & Polmar, Norman (1986). Submarines of the Imperial Japanese Navy 1904–1945. London: Conway Maritime Press.  
  • Chesneau, Roger, ed. (1980). Conway's All the World's Fighting Ships 1922–1946. Greenwich, UK: Conway Maritime Press.  
  • Hashimoto, Mochitsura (1954). Sunk: The Story of the Japanese Submarine Fleet 1942 – 1945. Colegrave, E.H.M. (translator). London: Cassell and Company. ASIN B000QSM3L0. 
  • Stille, Mark (2007). Imperial Japanese Navy Submarines 1941-45. New Vanguard 135. Botley, Oxford, UK: Osprey Publishing.  

External links

  • Tabular movements of submarine I-55
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