O 12-class submarine

The O 12-class submarine consisted of four submarines built for the Royal Netherlands Navy. The ships, with a diving depth of, 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 UD-2.

Construction

The ships were built by two 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
	20 October 1928	8 November 1930	Dutch Navy: 20 July 1931 German Navy: 30 January 1943	6 July 1945
	1 December 1928	18 April 1931	1 October 1931	13 June 1940
	29 December 1928	3 October 1931	4 March 1932	26 June 1943
	3 March 1930	27 May 1931	28 July 1932	1 September 1945