HNLMS O 1

O 1 was a Holland 7P patrol submarine of the Royal Netherlands Navy. The ship was built by De Schelde shipyard in Flushing and was the first submarine in the Dutch navy. It had a diving depth of 25 metres.

Service history
The submarine was laid down in Flushing at the shipyard of De Schelde under the name of Luctor et Emergo on 1 June 1904. As it was not yet certain the Dutch navy would purchase the ship. The design came from the American company Holland Torpedo Boat Co. The engineer Marly Hai was send to the shipyard to assist in the construction of the submarine. The launch took place on 8 July 1905.

A series of trials and tests where held that where overseen by committee appointed by the Ministry of Defence. The committee was not satisfied after the first series of tests but after the second series of tests the ship is purchased by the navy for 430000 Dutch Guilders.

On 21 Dec 1906 the ship was commissioned in the navy as Onderzeese boot 1 (Submarine 1) it is uncertain at which point the ship was renamed to O 1.

In 1907 the Dutch queen Wilhelmina of the Netherlands watches the submarine as it makes a dive. On 27 Mar 1908 prince Henry makes a visit to the O 1 while moored in Nieuwediep in Den Helder.

The O 1 is present in Amsterdamin September 1910 when the Belgian King and Queen visit the city. In 1914 the 160 pk OTTO petrol engine was replaced by a 200 pk M.A.N.  diesel engine. In 1920 the O 1 was decommissioned and eventually scraped.