HNLMS O 19
Introduction '''''O 19''''', laid down as '''''K XIX''''', was an  of the Royal Netherlands Navy that saw service during World War II. ''O 19'', along with her sister ship , were the first submarines in the world to be equipped with a submarine snorkel that allowed the submarine to run its diesel engines while submerged.
Ship history ''O 19'' aground on Ladd Reef===Commissioning===The submarine's keel was laid at the Wilton-Fijenoord shipyard in Rotterdam on 15 June 1936 as ''K XIX'' but was renamed ''O 19'' at some point. The submarine was launched on 22 September 1938 and commissioned in the Dutch navy on 3 July 1939.After her commissioning the HNLMS ''O 19'' was put into service by commander Lieutenant-on-sea 1 (LTZ 1) K. van Dongen on July 3, 1939, following a short training period. Three weeks later, on 25 July 1939, the new submarine was already on its way to the Dutch East Indies via the Suez Canal where the boat arrived on 13 September.===World War II===On 10 May 1940, the day the Germans invaded the Netherlands, the entire mobilization was proclaimed in the Dutch colony. Most Dutch warships, including the ''O 19'', were used to protect allied merchant ships and to patrol the Indonesian archipelago. On May 31, 1941, the command of the Dutch submarine was taken over by LTZ 1 F.J.A. Knoops.The submarine performed patrols and missions in the Pacific theater, sinking several Japanese vessels, attacking convoys and laying mines. On 8 July 1945, ''O 19'' was en route to Subic Bay in the Philippines at a speed of  when it struck Ladd Reef in the South China Sea. Unable to pull free of the reef, the crew of ''O 19'' were rescued by the U.S. Navy submarine . To prevent capture, ''O 19'' was scuttled by both crews using explosives, torpedoes and gunfire.
Design The diesel engines for the HNLMS ''O 19'' was built under the license of the Swiss ''Sulzer'' by the ''Koninklijke Maatschappij De Schelde'' in Vlissingen. It had 40 mm Bofors guns, which could be stored in watertight compartments in front of and behind the command tower, just like the ''O 12''-class submarines. ''O 19'' was also equipped with noise pulses from ''Atlas Werke'' in Bremen, Germany, which at that time were considered the best in the world. In 1943, during a major maintenance period in Great Britain, the noise spanner of ''O 19'' was replaced by an Asdic system of type 120B.
Summary of raiding history Ships sunk by ''O 19''. Date  Ship name  Nationality/Type  Tonnage (GRT)  Fate10 January 1942  ''Akita Maru''  Japanese freighter  3817  Sunk15 January 1942  ''Tairu/Taieryu Maru''  Japanese ? 4944  Sunk10 September 1944  ''Korei Maru''  Japanese merchant  599  Sunk16 November 1944  ''Kaishin Maru No.2''  Japanese coaster  150  Sunk9 January 1945  ''Shinko Maru No.1''  Japanese auxiliary gunboat  935  Sunk10 April 1945  ''Hosei Maru''  Japanese merchant tanker  676  Sunk
References ===Bibliography===*
External links * Video of ''USS Cod'' sinking ''O 19''* IWM Interview with survivor Elke Scholte