HNLMS Marten Harpertszoon Tromp

HNLMS Marten Harpertszoon Tromp (Hr.Ms. Marten Harpertszoon Tromp) was a unique pantserschip (coastal defence ship) of the Royal Netherlands Navy build the by Rijkswerf in Amsterdam.

Design
The ship was 100.78 m long, had a beam of 15.19 m, a draught of 5.69 m, and had a displacement of 5,210 ton. The ship was equipped with 2 shaft reciprocating engines, which were rated at 6400 ihp and produced a top speed of 16.5 kn.

The ship had a belt armour of 6 in, 8 in barbette armour and turret armour.

The main armament of the ships were two 9.4 in single turret guns. Secondary armament included four single 15 cm guns and eight 7.5 cm single guns.

Service history
Tromp was launched on 15 June 1904 at the Rijkswerf in Amsterdam. 5 April 1906 she was commissioned by Captain Koster as the first commander of the ship. The same year on 25 June she made a visit to Norway for an official visit to the ship by Haakon VII of Norway.

10 august 1909 Tromp together with HNLMS Koningin Regentes and HNLMS De Ruyter (1901) departed from Batavia to China, Hong Kong, Japan and the Philippines to show the flag.

2 March 1920 she and HNLMS Hertog Hendrik departed from Den Helder for a four month journey to Asia to show the vlag. They visited the ports of Singapore, Saigon, Hongkong, Kobe and Manilla.

From 21 June to 30 July 1926 the ship together with Jacob van Heemskerck, torpedoboats Z 7 and Z 8 and submarines O 9 and O 11 departed from Den Helder to the Baltic. During the trip they visited the ports of Kiel, Göteborg and Trondheim.

The ship was decommissioned in 1927.