Supriya Ghosh


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Name  O 4
Builder  De Schelde, Flushing
Commissioned  17 June 1914
Construction started  15 June 1912
Length  32 m
Ordered  18 December 1911
Laid down  15 June 1912
Decommissioned  1935
Launched  5 August 1913
Draft  2.73 m

O 4 was an O 2 class patrol submarine of the Royal Netherlands Navy. The ship was built by De Schelde shipyard in Flushing, Netherlands.

Service history

The submarine was ordered on 18 December 1911. On 15 June 1912 the O 4 was laid down in Flushing at the shipyard of De Schelde. The launch took place on 5 August 1913.

A passive sonar and two retractable periscopes were installed on the ship making it the first submarine in the Dutch navy having this equipment.

On 17 June 1914 the ship is commissioned in the navy. During World War I the ship was based in Flushing. Queen Wilhelmina visited the ship on 22 December 1914.

In 1935 the O 4 was decommissioned.


HNLMS O 4 Wikipedia

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