General characteristics
The Uzushio-class submarine adopted the teardrop hull type for the first time in the Maritime Self-Defense Force. When the Asashioclass was built, the adoption of the teardrop type had been examined. However, the Maritime Self-Defense Force at that time selected the conventional model that valued safety from the operation results. It was moving to the warship type that valued the underwater performance, and the examination that used the model in 1960 fiscal year was advanced, and necessary data was obtained also with TRDI in the age.
When designing, the location etc. are original though it refers to the Barbel-classsubmarine of United States Navy of not a complete copy but the inner shell structure and sail plane and torpedo tube.
The Barbel-class submarines, the last diesel-electric propelled attack submarines built by the United States Navy, incorporated numerous, radical engineering improvements over previous classes. They were the first production warships built with the teardrop-shape hull first tested on the experimental USS Albacore (AGSS-569), and the first to combine the control room, attack center, and conning tower in the same space in the hull. They were of double hull design with 1.5-inch thick HY80 steel. This class of submarine became part of the United States Navy's fleet in 1959 and was taken out of service 1988–1990, leaving the Navy with an entirely nuclear-powered submarine fleet.
The I-201-class submarines were submarines of the Imperial Japanese Navy during World War II. These submarines were of advanced design, built for high underwater speed, and were known as Sentaka-Dai type submarine or Sentaka type submarine. The type name, was shortened to Suichū Kōsoku Sensuikan Ō-gata.
The Japan Maritime Self-Defense Force, also simply known as the Japanese Navy, is the maritime warfare branch of the Japan Self-Defense Forces, tasked with the naval defense of Japan. The JMSDF was formed following the dissolution of the Imperial Japanese Navy (IJN) after World War II. The JMSDF has a fleet of 154 ships and 346 aircraft and consists of approximately 45,800 personnel. Its main tasks are to maintain control of the nation's sea lanes and to patrol territorial waters. It also participates in UN-led peacekeeping operations (PKOs) and Maritime Interdiction Operations (MIOs).
The Yūshio class was a Japanese diesel-electric submarine class operated by the JMSDF. It was a second generation submarine, a development of the Uzushio class, incorporating a teardrop hull, with a resulting increase in underwater performance on the Uzushio class. Ten were built under the fourth defense plan in 1975 fiscal year. A training submarine, Yukishio, was retired on March 7, 2008. All vessels were retired on the completion of the Harushio class.
JDS Ōshio (SS-561) was the only ship of her kind in service with Japanese Maritime Self Defense Force. Ōshio was planned and built to replace the aging JDS Kuroshio.
A teardrop hull is a submarine hull design which emphasizes submerged performance over surfaced performance. It was somewhat commonly used in the early stages of submarine development, but was gradually abandoned in the early 20th century in favour of designs optimized for high performance on the surface as a result of changes in operational doctrine. Although naval doctrine changed, design practices remained until the later parts of World War II when the German Kriegsmarine suffered ever-growing losses of submarines in the Battle of the Atlantic.
The People's Liberation Army Navy Submarine Force (PLANSF) is the submarine service of the People's Liberation Army Navy. It consists of all types of submarines in operational service organized into three fleets: the North Sea Fleet, the East Sea Fleet, and the South Sea Fleet. Submarines have long been one of the three focuses of the People's Liberation Army Navy, and when the decision was made in late 2006 to concentrate on building other principal surface combatants to strengthen the air defense and to further delay the construction of aircraft carriers due to insufficient air cover, submarines will continue to play the lead dominant role in the assault force for the PLAN. Currently, PLANSF operates a fleet of 66 submarines which include nuclear as well as conventional submarines.
JDS Oyashio (SS-511) was a submarine of the Japan Maritime Self-Defense Force, named after the Oyashio Current, a cold current that comes down through the Bering Strait.
The Jang Bogo-class submarine is a variant of the Type 209 diesel-electric attack submarine initially developed by Howaldtswerke-Deutsche Werft (HDW) of Germany, intended for service with the South Korean Navy and Indonesian Navy. A Daewoo (DSME)-upgraded model of the Jang Bogo class Type 209 was exported by Korea to Indonesia in 2012, amid heavy competition from Russian, French, and German-Turkish consortiums including from Germany's original Type 209. The variant was considered for possible purchase by Thailand as well, as both newly built and second-hand options. The class is named for ancient Korean maritime figure Jang Bogo.
JDS Nadashio (SS-577) was a Japanese diesel-electric Yūshio-class submarine weighing 2,250 tons. It was launched on 27 January 1983 and decommissioned by the Maritime Self-Defense Force on 1 June 2001.
JS Harushio (SS-583) was the first boat of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Natsushio (SS-584) was the second ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Hayashio (SS-585) was the third ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Arashio (SS-586) was the fourth ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Wakashio (SS-587) was the fifth ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Fuyushio (SS-588) was the sixth ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
JS Asashio (SS-589) was the seventh ship of the Harushio-class submarine of Japan Maritime Self-Defense Force.
The Futami class was a class of oceanographic research ship of Japan Maritime Self-Defense Force (JMSDF) in the late 1970s.
JS Nichinan (AGS-5105) is the only ship of her type of oceanographic research ship for the Japan Maritime Self-Defense Force.
JDSAkashi(AGS-5101) was an oceanographic research ship of Japan Maritime Self-Defense Force (JMSDF) in the late 1960s.
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Japan Maritime Self-Defense Force