Japanese submarine I-29

I-29 on sea trials, 15 February 1942
History
Japan
NameI-29
BuilderYokosuka Naval Arsenal
Launched29 September 1940
Commissioned27 February 1942
Nickname(s)Matsu
FateSunk by USS Sawfish, 26 July 1944
General characteristics
Class & typeType B1 submarine
Displacement
  • 2,584 tons standard
  • 3,654 tons submerged
Length108.5 m (356 ft)
Beam9.3 m (31 ft)
Draught5.12 m (16.8 ft)
Propulsion2-shaft diesel (12,400 hp (9,200 kW)) and electric motor (2,000 hp (1,500 kW))
Speed23.5 knots (44 km/h) surface, 8 knots (15 km/h) submerged
Range14,000 nautical miles (26,000 km) at 16 knots (30 km/h)
Test depth100 m (330 ft)
Complement101 officers and men
Armament6 × 533 mm torpedo tubes forward (17 torpedoes) + 1 × 14 cm/40 11th Year Type naval gun
Aircraft carriedone Yokosuka E14Y "Glen"'Type 0' reconnaissance seaplane

I-29, code-named Matsu (松, Japanese for "pine tree"), was a B1 type submarine of the Imperial Japanese Navy used during World War II on two secret Yanagai missions with Germany, sinking seven cargo ships. She was sunk while returning from the second mission.