DD-122 Hatsuyuki Class
The HATSUYUKI class of all-purpose destroyers of the 3rd generation were completed from 1982 to 1987. A total of 12 ships were built to replace old destroyers acquired in the early days of JMSDF (Japan Maritime Self-Defence Force). Now they are the standard escort ship, but among the warships of Maritime Self Defense Force it was an epoch-making escort ship. The escort ships before this put emphasis on anti-submarine capability. However, the DD-122 Hatsuyuki class was initiated as the all-purpose destroyer of the "88 fleet" concept (8 escort ships/8 anti-sumbarine helicopter system).
The general-purpose escort ship construction was started after the DDK (anti-submarine model escort ship) had been commissioned, with the DDA (the anti-aircraft model escort ship) as a succession to that. Along with the DDG (the missile escort ship) and the DDH (the helicopter on-board escort ship), it is the warship which bears the center of the guard fleet.
To balance the anti-submarine, anti-warship and anti-aircraft missions, various armaments are on-board, along with landing space for the anti-submarine helicopter on the rear deck and the equipment to house one anti-submarine helicopter, usually HSS-2. In addition, as computer-era-escort ships, the Hatsuyuki class destroyers are designed to be system ships that can process target distinction, chase, weapons use electronically.
The gas turbine propulsion was adopted for the first time, leading to a great improvement of mobility. As to the MIA gas turbine Auxiliary Generating Engine which was originally developed by KHI, one set of MIA-02 type gas turbine (1,000kW) is installed on each "Hatsuyuki" type DD vessel (total 12 ships), two sets are installed on each "Asagiri" type DD vessel (total 8 ships), and one set is installed on each "Abukuma" type DE vessel (total 6 ships).
Equipment in the former bridge section, such as the CIC, was moved to inside the hull, raising survivaility. The anti-ship missile defense was equipped with the soft kill equipment for the first time.
After construction of this class began, the Falkland War between England and Argentina erupted. During this conflict a Argentian sank a British destroyer which was built with light aluminum alloy structure, due to a fire started by an anti-ship cruise missile missile strike. Drawing on this combat lesson, the eighth warship of this class (Yamayuki) and subsequent units, were modified with the structurals material such as steel, and the displacement was somewhat increased.
The construction budget of the first unit was 30,671,000,000 Yen, while the last unit's cost reached about 37,539,000,000 Yen.
Furthermore, in 1995 the lead ship Hatsuyuki assignment was changed from the guard fleet to the local party. In addition, the last warship "Shimayuki" was redsignated as a training ship (the TV3513) and modified in 1998.
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