Jacob van Heemskerck in New York, 2004
Class overview
Name	Jacob van Heemskerck class (L type)
Builders	Royal Schelde Shipyard
Operators	Royal Netherlands Navy  Chilean Navy
Preceded by	Tromp-class frigate
Succeeded by	De Zeven Provinciën-class
Built	1981-1986
In commission	1986-2020
Planned	2
Completed	2
Retired	2
General characteristics
Type	Anti-aircraft warfare (AAW)frigate
Displacement	3,000 tons standard 3,750 tons full load
Length	130 m (426 ft 6 in)
Beam	14.5 m (47 ft 7 in)
Draught	4.4 m (14 ft 5 in)
Propulsion	2 shaftCombined gas or gas (COGOG) system: 2Rolls-Royce Tyne RM1Cgas turbines, 4,900 shp (3,700 kW) each 2Rolls-Royce Olympus TM3Bgas turbines, 25,700 shp (19,200 kW) each (boost)
Speed	30 kn (56 km/h; 35 mph) maximum 20 kn (37 km/h; 23 mph) cruising
Range	4,700 nmi (8,700 km; 5,400 mi) at 16 kn (30 km/h; 18 mph)
Complement	197
Sensors & processing systems	Radar LW-08 SMART-S Mk1 2 xSTIR-240 STIR-180 ZW-06 Sonar PHS-36
Armament	4 × Mk46 torpedo tubes (2 twin mounts) 8 ×RGM-84 Harpoon anti-ship missile launchers (2 quad mounts) 1 ×RIM-66 Standard SAM from aMk13 Guided Missile Launch System (40 missiles total) 8 ×RIM-7 NATO Sea Sparrow SAM from aMk29 Guided Missile Launch System (8 missile in the launcher and 16 in the magazine) 1 ×Goalkeeper 30 mmCIWS gun system 2 × 20 mm guns

TheJacob van Heemskerck-class frigate was aclass offrigates of theRoyal Netherlands Navy.^[1] They were designed to be an air defence version of theKortenaer class.^[2] The helicopter was replaced by aStandard medium rangesurface-to-air missile (SAM) system and associated radars. Two ships were built for the Royal Netherlands Navy.^[3] In 2005 they were sold to theChilean Navy.

In the early 1970s, theKoninklijke Marine (Royal Netherlands Navy) developed what became known as the 'Standard' frigate, with anti-submarine and anti-aircraft versions using common hull designs and machinery and as far as practicable, common electronics and sensors.^[4] It was planned to order 12 anti-submarine variants (theKortenaer class), enough to equip two task groups (each led by aTromp-class guided-missile frigate) to operate in the Atlantic, while a single anti-aircraft version would act as flagship for a third task group, consisting of the olderVan Speijk-class frigates to operate in the English Channel and North Sea.^[5] In 1981, however, twoKortenaers were sold to Greece while building, and it was decided to build two anti-aircraft versions of the 'Standard' class (the 'L' class) as replacements, with the planned thirteenth 'Standard'-class frigate being abandoned.^[6][7]

The design'sflush-decked hull, with anoverall length of 130.20 metres (427.2 ft), abeam of 14.40 metres (47.2 ft) anddraught of 4.23 metres (13.9 ft), is the same as used in theKortenaers, as was theCombined gas and gas (COGAG) machinery, with twoRolls-Royce Tyne RM-1C cruise engines (3,700 kilowatts (4,900 shp)) and twoRolls-Royce Olympus TM-3 boost engines (19,200 kilowatts (25,800 shp)) drive the ship to a speed of 30 knots (35 mph; 56 km/h).^[4][7]

AMk 13 missile launcher for the AmericanStandard SM-1 medium-rangesurface-to-air missile (SAM) (with a 40-missile magazine) replaced the helicopter hangar and deck of theKortenaers. This was supplemented by an eight round Mk 29NATO Sea Sparrow short range SAM launcher forward, with 24 missiles carried. AGoalkeeperclose-in weapon system was mounted aft, while the forward-mountedOTO Melara 76 mm gun of theKortenaers was omitted. Launchers for eightHarpoonanti-ship missiles were positioned amidships, while anti-submarine armament consisted of four tubes forMark 46 torpedoes.^[7]

As built, the ships were fitted with a Signaal LW-08 long-range air search radar, a DA-05 target tracking radar. TwoSTIR-240 director radars provided guidance for the Standard missiles, while aSTIR-180 radar directed the Sea Sparrow missiles. A PHS-36 hull sonar was also fitted.^[8] In the nineties the DA-05 radar was replaced by the new SMART tracking radar.

In 2018 the Chilean navy was looking at options to either replace theJacob van Heemskerck-class frigates or modernize them.^[9] At the end of 2019 they were both taken out of service.^[10] They were replaced with twoAdelaide-class frigates purchased from Australia.

Two ships were built byRoyal Schelde dockyard.^[11] The ships were named after Admirals (Jacob van Heemskerk andWitte Corneliszoon de With) as is usual practice in the Royal Netherlands Navy.

Jacob van Heemskerck-class frigates^[3]

Name	Customer	Laid down	Launched	Commissioned	Fate	Note
Jacob van Heemskerck	Royal Netherlands Navy	21 January 1981	5 November 1983	15 January 1986	Decommissioned in 2004.[12] Sold toChile in 2005.	RenamedAlmirante Latorre (namesake:Juan José Latorre,pennant number: FFG-14) inChilean Navy service.The ship was retired of the fleet at the end of 2019.[10] Decommissioned.
Witte de With	Royal Netherlands Navy	15 December 1981	25 August 1984	17 September 1986	Decommissioned in 2005.[12] Sold toChile in 2005.	RenamedCapitán Prat (namesake:Arturo Prat, pennant number: FFG-11) in Chilean Navy service. The ship was retired of the fleet at the end of 2019.[10] Decommissioned.

• 
  Jacob van Heemskerck (F812) in New York, 2004
• 
  Capitan Prat on the North Sea
• 
  Almirante Latorre (FFG 14), 2007

• List of naval ship classes in service
• Kortenaer-class frigates - The Jacob van Heemskerck-class is based on this design, with only slight modifications.

• van Amstel, W.H.E. (1991).De schepen van de Koninklijke Marine vanaf 1945 (in Dutch). Alkmaar: De Alk.ISBN 90-6013-997-6.
• Baker, A.D. (1998).The Naval Institute Guide to Combat Fleets of the World 1998–1999. Annapolis, Maryland, USA: Naval Institute Press.ISBN 1-55750-111-4.
• Gardiner, Robert; Chumbley, Stephen (1995).Conway's All The World's Fighting Ships 1947–1995. Annapolis, Maryland, USA: Naval Institute Press.ISBN 1-55750-132-7.
• Saunders, Stephen (2002).Jane's Fighting Ships 2002–2003. Coulsdon, UK: Jane's Information Group.ISBN 0-7106-24328.
• Schoonoord, D.C.L. (2012).Pugno pro patria: de Koninklijke Marine tijdens de Koude Oorlog (in Dutch). Franeker: Van Wijnen.ISBN 978-90-5194-455-6.
• Raven, G.J.A., ed. (1988).De kroon op het anker: 175 jaar Koninklijke Marine (in Dutch). Amsterdam: De Bataafsche Leeuw.ISBN 90-6707-200-1.
• W.H.E., van Amstel (1991).De schepen van de Koninklijke Marine vanaf 1945. Alkmaar: De Alk.ISBN 9060139976.

• Nooteboom, S.G. (2001).Deugdelijke schepen: marinescheepsbouw 1945-1995 (in Dutch). Zaltbommel: Europese Bibliotheek.ISBN 90-288-2637-8.

• Jacob van Heemskerck - class Guided Missile Frigate (L-Frigate)
• Jacob van Heemskerck air defence frigates

• Jacob van Heemskerck-class frigates
• Frigates of the Royal Netherlands Navy
• Frigate classes
• COGOG ships

• CS1 Dutch-language sources (nl)
• Articles with short description
• Short description matches Wikidata