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
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

The O 12 class was a class of four submarines, built for the Royal Netherlands Navy. The ships, with a diving depth of 60 metres (200 ft), were used for patrols in the Dutch home waters. The class comprised O 12, O 13, O 14 and O 15. O 12 entered German service in 1943 as U-D2.

Construction

The ships were built by two different shipyards. O 12, O 13 and O 14 were built by Koninklijke Maatschappij De Schelde in Vlissingen and O 15 in Rotterdam at Fijenoord shipyard.

Name Laid down Launched Commissioned Decommissioned
O 12 20 October 1928 8 November 1930 Dutch Navy: 20 July 1931

German Navy: 30 January 1943

6 July 1945 (scuttled)
O 13 1 December 1928 18 April 1931 1 October 1931 13 June 1940
O 14 29 December 1928 3 October 1931 4 March 1932 26 June 1943
O 15 3 March 1930 27 May 1931 28 July 1932 1 September 1945

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