General characteristics [2] Type: German Type U 3 submarine Displacement: 421 t (414 long tons) surfaced 510 t (500 long tons) submerged Length: 51.28 m (168 ft 3 in) (o/a) 45.00 m (147 ft 8 in) (pressure hull) Beam: 5.6 m (18 ft 4 in) Draught: 3.05 m (10 ft) Propulsion: 2 shafts 2 × Körting 8-cylinder two stroke paraffin motors with 600 PS (440 kW; 590 shp) 2 × Siemens-Schuckert electric motors with 1,030 PS (760 kW; 1,020 shp) 550 rpm surfaced 600 rpm submerged Speed: 11.8 knots (21.9 km/h; 13.6 mph) surfaced 9.4 knots (17.4 km/h; 10.8 mph) submerged Range: 1,800 nmi (3,300 km; 2,100 mi) at 12 knots (22 km/h; 14 mph) surfaced 50 nmi (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph) Test depth: 30 m (98 ft) Boats & landing craft carried: 1 dingi Complement: 3 officers, 19 men Armament: 4 × torpedo tubes (2 bow, 2 stern) 6 × 45 cm (18 in) torpedoes 1 × 5 cm (2.0 in) SK L/40 gun (from 1915)