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The ''Jacob van Heemskerck class'' frigate was a class of frigates of the Royal Netherlands Navy. They were built to be an air defence version of the Kortenaer class frigate. The helicopter was replaced by a Standard medium range SAM system and associated radars. 2 ships were built for the Dutch Navy, in 2005 they were sold to the Chilean Navy. ==Design== In the early 1970s, the ''Koninklijke 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.〔Gardiner and Chumbley 1995, p. 277.〕 It was planned to order 12 anti-submarine variants (the ''Kortenaer'' class, enough to equip two task groups (each led by a ''Tromp''-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 older ''Van Speijk''-class frigates to operate in the English Channel and North Sea.〔Gardiner and Chumbley 1995, p. 269.〕 In 1981, however, two ''Kortenaer''s 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 13th 'Standard'-class frigate being abandoned.〔Gardiner and Chumbley 1995, pp. 269, 277.〕〔Baker 1998, p. 531.〕 The design's flush-decked hull, with an overall length of , a beam of and draught of , is the same as used in the ''Kortenaer''s, as was the Combined gas and gas (COGAG) machinery, with two Rolls-Royce Tyne RM-1C cruise engines () and two Rolls-Royce Olympus TM-3 boost engines () drive the ship to a speed of .〔〔 A Mk 13 missile launcher for the American Standard SM-1 medium-range surface-to-air missile (SAM) (with a 40-missile magazine) replaced the helicopter hangar and deck of the ''Kortenaer''s. This was supplemented by an eight round Mk 29 NATO Sea Sparrow short range SAM launcher forward, with 24 missiles carried. A Goalkeeper close-in weapon system was mounted aft, while the forward-mounted OTO Melara 76 mm gun of the ''Kortenaer''s was omitted. Launchers for eight Harpoon anti-ship missiles were positioned amidships, while anti-submarine armament consisted of four tubes for Mark 46 torpedos.〔 As built, the ships were fitted with a Signaal LW-08 long-range air search radar, a DA-05 target tracking radar. Two STIR-240 director radars provided guidance for the Standard missiles, while a STIR-180 radar directed the Sea Sparrow missiles. A PHS-36 hull sonar was also fitted.〔Gardiner and Chumbley 1995, pp. 277–278.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jacob van Heemskerck-class frigate」の詳細全文を読む スポンサード リンク
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