Japanese submarine Ro-33

Ro-33 on 8 April 1939.
History
Japan
Name	Original name unknown
Builder	Kure Naval Arsenal, Kure, Japan
Laid down	8 August 1933
Launched	10 October 1934
Renamed	Ro-33 on 10 October 1934
Completed	7 October 1935
Commissioned	7 October 1935
Decommissioned	15 November 1939
Recommissioned	1 May 1940
Decommissioned	15 May 1941
Recommissioned	ca. mid-November 1941
Fate	Sunk 29 August 1942
Stricken	5 October 1942
General characteristics
Class and type	Kaichū type submarine (K6 subclass)
Displacement	955 tonnes (940 long tons) surfaced 1,219 tonnes (1,200 long tons) submerged
Length	73 m (239 ft 6 in) overall
Beam	6.7 m (22 ft 0 in)
Draft	3.25 m (10 ft 8 in)
Installed power	3,000 bhp (2,200 kW) (diesel) 1,200 hp (890 kW) (electric motor)
Propulsion	Diesel-electric 1 × diesel engine 1 × electric motor
Speed	19 knots (35 km/h; 22 mph) surfaced 8.25 knots (15.28 km/h; 9.49 mph) submerged
Range	8,000 nmi (15,000 km; 9,200 mi) at 12 knots (22 km/h; 14 mph) surfaced 90 nmi (170 km; 100 mi) at 3.5 knots (6.5 km/h; 4.0 mph) submerged
Test depth	75 m (246 ft)
Crew	75
Armament	4 × bow 533 mm (21 in) torpedo tubes 1 × 76.2 mm (3.00 in) L/40 anti-aircraft gun 1 × 13.2 mm (0.52 in) Type 93 anti-aircraft machinegun

Ro-33 was an Imperial Japanese Navy Ro-33-class submarine. Completed and commissioned in November 1935, she served during World War II in the South China Sea, Indian Ocean, and southwestern Pacific Ocean and operated in support of Japanese forces in the invasion of British Malaya, the invasion of Java, the Battle of the Coral Sea, the Guadalcanal campaign, and the New Guinea campaign. She was sunk in August 1942 during her fifth war patrol.