Ha-3-class submarine

	Japanese submarine Ha-3, in August 1911
Class overview
Name	Ha-3 class
Builders	Vickers, Barrow-in-Furness, UK
Operators	Imperial Japanese Navy
Preceded by	Ha-1 class
Succeeded by	Ha-7 class
In commission	1911–1929
Completed	3
Retired	3
General characteristics
Type	Submarine
Displacement	291 long tons (296 t) surfaced; 326 long tons (331 t) submerged;
Length	43.3 m (142 ft 1 in)
Beam	4.14 m (13 ft 7 in)
Draft	3.43 m (11 ft 3 in)
Installed power	600 hp (450 kW) (gasoline engines); 300 hp (220 kW) (electric motors);
Propulsion	Gasoline engines; Electric motors; 1 shaft;
Speed	12 knots (22 km/h; 14 mph) surfaced; 7 knots (13 km/h; 8.1 mph) submerged;
Range	660 nmi (1,220 km; 760 mi) at 12 knots (surfaced); 60 nmi (110 km; 69 mi) at 4 knots (7.4 km/h; 4.6 mph) (submerged);
Test depth	30.5 m (100 ft)
Complement	26 officers and enlisted
Armament	2 × 18 in (460 mm) bow torpedo tubes (4 × torpedoes); 1 × machine gun;

The Ha-3-class submarine (波三型潜水艦, Ha-san-gata sensuikan) was an early class of submarines of the Imperial Japanese Navy.

Class overview
Japanese submarine Ha-3, in August 1911
Name	Ha-3 class
Builders	Vickers, Barrow-in-Furness, UK
Operators	Imperial Japanese Navy
Preceded by	Ha-1 class
Succeeded by	Ha-7 class
In commission	1911–1929
Completed	3
Retired	3
General characteristics
Type	Submarine
Displacement	291 long tons (296 t) surfaced 326 long tons (331 t) submerged
Length	43.3 m (142 ft 1 in)
Beam	4.14 m (13 ft 7 in)
Draft	3.43 m (11 ft 3 in)
Installed power	600 hp (450 kW) (gasoline engines) 300 hp (220 kW) (electric motors)
Propulsion	Gasoline engines Electric motors 1 shaft
Speed	12 knots (22 km/h; 14 mph) surfaced 7 knots (13 km/h; 8.1 mph) submerged
Range	660 nmi (1,220 km; 760 mi) at 12 knots (surfaced) 60 nmi (110 km; 69 mi) at 4 knots (7.4 km/h; 4.6 mph) (submerged)
Test depth	30.5 m (100 ft)
Complement	26 officers and enlisted
Armament	2 × 18 in (460 mm) bow torpedo tubes (4 × torpedoes) 1 × machine gun