O 12-class submarine
HNLMS O 12 Class overview Name: O 12 Builders: Koninklijke Maatschappij De Schelde (3) Fijenoord (1) Operators: Royal Netherlands Navy Preceded by: O 9 class Succeeded by: O 16 Built: 1928–1932 In commission: 1931-1945 Completed: 4 General characteristics Type: Submarine Displacement: 610 tons surfaced 754 tons submerged Length: 60.42 m (198 ft 3 in) Beam: 6.83 m (22 ft 5 in) Draught: 3.6 m (11 ft 10 in) Propulsion: 2 × 900 bhp (671 kW) diesel engines 2 × 310 bhp (231 kW) electric motors Speed: 16 kn (30 km/h; 18 mph) surfaced 8 kn (15 km/h; 9.2 mph) submerged Range: 3,500 nmi (6,500 km; 4,000 mi) at 8 kn (15 km/h; 9.2 mph) or 10 kn (19 km/h; 12 mph) on the surface 26 nmi (48 km; 30 mi) at 8 kn (15 km/h; 9.2 mph) submerged Complement: 29-31 Armament: 4 × 21 inch bow torpedo tubes 1 × 21 inch stern torpedo tube 2 × 44 mm guns 1 × 12.7 mm machine gun ...