De Zeven Provinciën-class cruiser
The De Zeven Provinciën" class (also called Eendracht" class) was a class of light cruisers. They were built by Rotterdamsche Droogdok Maatschappij (RDM) and Wilton-Fijenoord for the Royal Netherlands Navy. The name "De Zeven Provinciën" refers to the seven provinces which formed the Dutch Republic in 1581. Design. In the 1930s there was an increased awareness in the Netherlands about the threat which the Imperial Japanese Navy posed to the Dutch East Indies. To face this, the "Koninklijke Marine" embarked on a major naval expansion program in 1932, which included building two new light  cruisers as replacements for the aging s. The design was an improvement of the earlier and both ships were laid down in 1939. The first was named "Kijkduin", later changed to "Eendracht", and the second one received the name "De Zeven Provinciën", hence the name of the class. The main armament was designed as two triple and two twin Bofors 152 mm/53 caliber guns. However, construction was interrupted by the German invasion of the Netherlands on 10 May 1940. "De Zeven Provinciën" was 25% completed and "Kijkduin" 12%. The Germans redesigned the ships main armament. "De Zeven Provinciën" was planned  with four dual turrets 15 cm SK C/28 guns. "Eendracht" was planned with smaller guns taken from a broken down battleship, but the exact gun types are unknown. The Germans continued work on "De Zeven Provinciën" which was more advanced than its twin; it was renamed "KH1" ("KH" means "Kreuzer Holland") and modified by fitting an "Atlantik Bow". "Eendracht" was renamed "KH2". Work progressed very slowly as the dockyards' capacity was used for other purposes and sabotage by the Dutch resistance affected progress. On 24 December 1944, "KH1" was launched for use as a blockship in the Nieuwe Waterweg of  Rotterdam but this action was never carried out. After the end of World War II, construction resumed on both ships to a modified design which incorporated the lessons of the war. Armament was modified from two triple and two twin Bofors 152 mm/53 guns, six twin 40 mm AA and two triple 533 mm torpedo tubes to four twin Bofors 152 mm/53 guns, four twin Bofors 57 mm/60 guns and eight single Bofors 40 mm/70 guns. An improved propulsion plant was fitted as well as a second funnel and advanced electronics. Names were also changed with "Eendracht" becoming "De Zeven  Provinciën" and the former "De Zeven Provinciën" being renamed "De Ruyter". Both ships were finally commissioned by the Royal Netherlands Navy in 1953. Ships in class. There were two ships in the class: (renamed "De Ruyter" in 1947) and "Kijkduin" (renamed "Eendracht" c. 1940, "De Ruyter" in 1944 and "De Zeven Provinciën" in 1947). Both ships enjoyed long service lives, first in the "Koninklijke Marine" (until the early 1970s) and then in the "Marina de Guerra del Perú". Royal Netherlands Navy. In Dutch service both ships participated in several NATO exercises, and were frequently used as flagships for different naval  task forces. Between 1962 and 1964, "De Zeven Provinciën" underwent a refit by RDM which included the removal of the two aft turrets and the installation of a RIM-2 Terrier SAM system. Lack of funds precluded the same modifications from being carried out in "De Ruyter", which was decommissioned in 1972. Her sister ship followed suit in 1975; the cruisers were replaced in Dutch service by the two s. Peruvian Navy. "De Ruyter" was acquired by the Peruvian Navy and recommissioned in 1973 as fleet flagship . "De Zeven Provinciën" was also purchased in 1976, its RIM-2 Terrier SAM removed and  replaced by a hangar and a flight deck for ASH-3D Sea King helicopters, and recommissioned in 1978 as . From 1985 until 1988 "Almirante Grau" underwent a major modernization by Amsterdam Naval Services (ANS), which allowed the ship to remain in service, whereas "Aguirre" was decommissioned in 1999. "Almirante Grau" was decommissioned in 2017, and will be preserved as a museum ship. As of February 2022, the Peruvian Government has decided to open tender for the sale of the ship.