Imperial Japanese Navy — Submarine
Japanese submarine I-31
Service
- as I-31? — 13 May 19431,350 days of the war
Type B1 submarine
Particulars
- Name
- I-31
- Builder
- Yokosuka Naval Yard
- Laid down
- 6 December 1939
- Launched
- 13 March 1941
- Fate
- Sunk, 13 May 1943 (1943)
- Status
- Wreck
Specifications
- Displacement, surfaced
- 2,589 long tons (2,631 t)
- Displacement, submerged
- 3,654 long tons (3,713 t)
- Length
- 108.7 m (356.6 ft) OA
- Beam
- 9.3 m (30.5 ft)
- Draught
- 5.1 m (16.7 ft)
- Speed
- 23.5 knots (43.5 km/h, 27 mph)
- Range
- 14,000 nmi (25,928 km)
- Main gun
- 140 mm (5.5 in)
I-31 was a Type B1 submarine of the Imperial Japanese Navy. Yokosuka Naval Yard laid her keel on 6 December 1939. She was launched on 13 March 1941.
The class followed the Type J3 submarine and was succeeded by the Type B2 submarine.
The boat displaced 2,589 long tons surfaced and 3,654 long tons submerged. She measured 108.7 m (357 ft) long with a beam of 9.3 m (31 ft). Her designed speed was 23.5 knots.
Her main battery was one 140 mm (5.5 in) guns. She carried one aircraft. Her machinery developed 12,400 bhp.
She was in commission for 1,350 days of the Second World War.
She was sunk on 13 May 1943, at 52°33′N 172°11′E. The wreck survives.
Written from the harvested record. Every figure above is sourced; the wording is this site's own.
Armament and machinery
Armament and machinery
- Propulsion
- Diesel-electric
- 2 × diesel engine
- 2 × electric motor
- Power
- 12400 bhp (diesel)
- 2000 hp (electric motor)
- Armament
- 6 × bow 533 mm torpedo tubes
- 1 × 14 cm deck gun
- 2 × single 25 mm Type 96 anti-aircraft guns
- Aircraft
- 1 × floatplane
Sister ships
- Japanese submarine I-15
- Japanese submarine I-17
- Japanese submarine I-19
- Japanese submarine I-21
- Japanese submarine I-23
- Japanese submarine I-26
- Japanese submarine I-27
- Japanese submarine I-28
- Japanese submarine I-29
- Japanese submarine I-30
- Japanese submarine I-32
- Japanese submarine I-33
- Japanese submarine I-34
- Japanese submarine I-35
- Japanese submarine I-36
- Japanese submarine I-37
- Japanese submarine I-38
- Japanese submarine I-39
Sources
- Facts harvested from Japanese submarine I-31 on Wikipedia. Figures only — no wording is taken from it.
- Photograph: Unknown author — Imperial Japanese Navy Photograph Archive — Public domain — Wikimedia Commons