Type 89 torpedo

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The Type 89 torpedo (development name G-RX2) is a Japanese submarine-launched homing torpedo produced by Mitsubishi Heavy Industries. Together with the Harpoon, it replaced the unguided Type 72. Development was done by the Technical Research and Development Institute, a department of the Ministry of Defense, and began in 1970, with the design completed by 1984. After being formally approved in 1989 and named "Type 89", it entered service and is currently carried aboard the Oyashio, and Sōryū-class submarines. It was also carried by the Yūshio and Harushio-class submarines before they were retired from active service in 2006 and 2017 respectively. It is a wire-guided torpedo that features both active and passive homing modes. Compared to Mk-48 (ADCAP) torpedo, it is slightly longer (6.25 m to 5.79 m) and heavier (1,760 kg to 1,676 kg), but has a smaller warhead (267 kg to 295 kg). The successor to the Type 89 torpedo was developed under the development name "G-RX6" and officially named Type 18 (ja) in 2018. The Taigei class is equipped with a number of Type 18 torpedoes.