Military


DD-151 Asagiri Class

The DD-151 Asagiri ["morning mist"] class is an enlargemed and improved version of the Hatayuki general-purpose escort ship. The Asagiri class are longer, have an updated sensors fit and a more powerful propulsion system (license-built by Kawasaki Heavy Industries). The Asagiri class has the all-steel superstructures of the later units of the Hatayuki class, which was changed from aluminum as a result of lessons learned by Argentina and Great Britain in the Falklands War.

The class is well suited for anti-submarine work with, ASROC, Type 68 ASW torpedoes, a SH-60J ASW helicopter, towed tactical passive sonar array and Mitsubishi OQS-4A bow mounted medium frequency sonar (an improved version of the US SQS-23). In addition, they carry 8 RGM-84C Harpoon SSM, a Mk 29 Sea Sparrow missile launcher (18 missiles can be carried), 2 20 mm Mk 15 Phalanx CIWS, one 76-mm 62 cal. OTO Breda Compact gun, Mk 36 SRBOC decoy systems and the U.S. SLQ-25 Nixie acoustic torpedo system. It includes the LINK 11 and the LINK 14 communications systems. As for the direction control system, the OYQ-5 digital communication system exchanges strategy data with the helicopter. In addition, after the fifth warship the OPS-4c three dimensional air search radar was replaced by the OPS-24. All this on a length of 449 ft, max beam of 48 feet, 4,300 tons full load, quite a punch for a vessel this size.

The class is powered by 4 Kawasaki-Rolls-Royce Spey SM-1A gas turbines, generating 53,900 shaft horsepower to two controllable pitch propellers. 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).

The eight ships of the Asagiri Class Multi Purpose Destroyers joined the Japan Maritime Self-Defense Force (JMSDF) from 1988 to 1991. In 1991, the 8th ship of Asagiri' type DD vessel 'Umigiri' using four RR-Spey gas turbines (COGAG) were constructed at Ishikawajima Harima Heavy Industries co., Ltd.(IHI), and this ship has entered in service. The propu1sion system including gas turbines was manufactured by Kawasaki Heavy Industries, Ltd.(KHI). The construction budget of thefirst unit was 41,617,000,000 Yen, but after of the fifth warship it reached 42,615,000,000 Yen, and ended with a pricetag of 43,277,000,000 Yen for the final unit.

Namesakes

The first ASAGIRI (morning mist) was a HARUSAME class destroyer. This class consisted of five ships [375 tons, 29 knots, 55 crew], built between 1903 and 1905.

The second Asagiri, a 1750-ton Fubuki class destroyer, was sunk by US Marine land-based aircraft on 28 August 1942, off Santa Isabel, Solomon Islands area, near Guadalcanal. Japanese destroyers, starting with the Fubuki, began the state of the art destroyer design for World War II. With enclosed, double turrets and heavy gun and torpedo armament, the Fubukis and their successors, the "special type," set the standard for all later design.

Amagiri, a 1750-ton Fubuki class destroyer, was built at Tokyo, Japan. She was completed in November 1930 and spent the next decade taking part in combat exercises and, during the later 1930s, in operations connected with the Sino-Japanese War. When Japan began the Pacific War on 8 December 1942, Amagiri covered landings on the coast of Thailand. Later involved with the campaign to conquer Malaya and Singapore, she engaged two British destroyers off the Malay coast on the night of 27 January 1942. She also supported the invasion of western Java in February and served with Admiral Yamamoto's force in the Battle of Midway. Amagiri participated in the 14-15 October and 14 November bombardment missions during the Guadalcanal Campaign, and helped escort the last major Japanese convoy to that island, on 15 November 1942. Employed as a high-speed transport during the Central Solomons Campaign, she participated in the Battle of Kula Gulf on the night of 5-6 July 1943. While on another reinforcement run to Vila on 2 August, Amagiri rammed and sank the U.S. motor torpedo boat PT-109 and engaged other PT boats in Blackett Strait, south of Kolombangara. Later in the year, she was at Rabaul during the U.S. carrier air raids on 5 and 8 November and carried troops to Bougainville on 6-7 November. Another reinforcement mission to Bougainville, on 24-25 November 1943, resulted in the Battle of Cape Saint George, in which Amagiri escaped pursuing U.S. destroyers led by Captain Arleigh Burke. She was sunk by a mine near Borneo on 23 April 1944.




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