Japanese submarine Ro-31
Service
- as Submarine No. 7010 May 1927 — 31 January 19441,610 days of the war
- Name
- Ro-31
- Builder
- Kawasaki, Kobe, Japan
- Laid down
- 25 September 1921
- Launched
- 15 February 1923
- Commissioned
- 10 May 1927
- Decommissioned
- 15 December 1938
- Recommissioned
- 9 February 1942
- Struck
- 25 May 1945
- Fate
- Surrendered 2 September 1945
Scuttled 5 April 1946 (1945) - Status
- Wreck
Specifications
- Displacement, surfaced
- 852 long tons (866 t)
- Displacement, submerged
- 1,030 long tons (1,047 t)
- Length
- 74.22 m (243.5 ft) OA
- Beam
- 6.12 m (20.1 ft)
- Draught
- 3.73 m (12.2 ft)
- Speed
- 13 knots (24.1 km/h, 15 mph)
- Range
- 9,000 nmi (16,668 km)
- Main gun
- 120 mm (4.7 in)
Ro-31 was a submarine of the Kaichū type submarine (K5 subclass), operated by the Imperial Japanese Navy. Her keel was laid at Kawasaki, Kobe, Japan on 25 September 1921. She entered service on 10 May 1927, having been launched on 15 February 1923.
The boat displaced 852 long tons surfaced and 1,030 long tons submerged. She measured 74.2 m (244 ft) long with a beam of 6.1 m (20 ft). Her designed speed was 13 knots.
Her main battery was one 120 mm (4.7 in) guns. Her machinery developed 1,200 bhp.
She was in commission for 1,610 days of the Second World War. She was decommissioned on 15 December 1938. She recommissioned on 9 February 1942. She was struck from the register on 25 May 1945.
She was scuttled on 2 September 1945. 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 × Sulzer Mark I diesel engine, 143 tons fuel
- 2 × electric motor
- Power
- 1200 bhp (diesel)
- 1200 hp (electric motor)
- Armament
- 4 × bow 533 mm torpedo tubes
- 1 × 120 mm gun
- 1 × 6.5 mm machine gun
Sister ships
- Japanese submarine Ro-33
- Japanese submarine Ro-34
- Japanese submarine Ro-35
- Japanese submarine Ro-36
- Japanese submarine Ro-37
- Japanese submarine Ro-38
- Japanese submarine Ro-39
- Japanese submarine Ro-40
- Japanese submarine Ro-41
- Japanese submarine Ro-42
- Japanese submarine Ro-43
- Japanese submarine Ro-44
- Japanese submarine Ro-45
- Japanese submarine Ro-46
- Japanese submarine Ro-47
- Japanese submarine Ro-48
- Japanese submarine Ro-49
- Japanese submarine Ro-50
- Japanese submarine Ro-55 (1944)
- Japanese submarine Ro-56 (1944)
Sources
- Facts harvested from Japanese submarine Ro-31 on Wikipedia. Figures only — no wording is taken from it.
- Photograph: Imperial Japanese Navy — The Maru Special No.133 Japanese Submarines II — Public domain — Wikimedia Commons