Related Research Articles
A small waterplane area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, minimizes a vessel's response to sea state, even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines.
The People's Liberation Army Navy Surface Force is the surface warfare branch of China's People's Liberation Army Navy (PLAN), consisting of all surface vessels in operational service with the PLAN. The PLAN Surface Force operates 661 ships organized into three fleets: the North Sea Fleet, the East Sea Fleet and the South Sea Fleet.
The Ocean ships were a class of sixty cargo ships built in the United States by Todd Shipyards Corporation during the Second World War for the British Ministry of War Transport under contracts let by the British Purchasing Commission. Eighteen were lost to enemy action and eight to accidents; survivors were sold postwar into merchant service.
Type 744 buoy tender and its derivatives with the NATO reporting name Yannan (延南) class is a class of Chinese buoy tender that is in service with the People's Liberation Army Navy (PLAN) and Chinese civilian governmental establishments. It is a boat or vessel which services and replaces buoys.
Type 991 cable layer is a family of Chinese cable layers first saw service in Chinese navy, and later on, additional units also entered service with Chinese civilian authorities.
Type 904 dive tender is a class of Chinese dive tender designed the People’s Republic of China (PRC) for the People's Liberation Army Navy (PLAN), and the late models Type 904I and Type 904II have received the NATO reporting name Yanqian,(研潜 in Chinese), meaning Research Diving. In addition to perform diving support missions, Type 904 I and II ships are also general purpose research vessels (AGE)frequently tasked to perform various scientific research works.
Type 645 oceanographic research ship is an oceanographic ship developed by China for the People's Liberation Army Navy (PLAN) and other Chinese civilian establishments. Type 645 was an experimental program of the Fourth five-year plan of China and designed by the 2nd Directorate of 708th Institute of China State Shipbuilding Corporation, which is also more commonly known as China Shipbuilding and Oceanic Engineering Design Academy (中国船舶及海洋工程设计研究)Archived 2019-07-06 at the Wayback Machine nowadays. Construction begun in October 1977 and the ship was launched in October 1978, entering service with PLAN in December 1978. There are a total of twelve laboratories on board totaling 257 square meters. Deployment proved that the design was successful, and three more units were built for civilian use, named as Xiangyanghong 9, Xiangyanghong 14 and Xiangyanghong 16 respectively. However, on May 2, 1993, Xiangyanghong 16 was rammed and sunk by a Cypriot LNG carrier more than nine time of its size in the East China Sea near Jeju Island, with the loss of three crew members. The sister ships in civilian service are often tasked with military and paramilitary missions and thus frequently come under PLAN and Chinese Coast Guard control.
Type 813 spy ship is the first purpose-built, indigenously designed spy ship entering service with the People's Liberation Army Navy (PLAN).
Type 814A spy ship with NATO reporting name Dadie(大谍, meaning Big Spy) is a type of Chinese spy ship in service with the People's Liberation Army Navy (PLAN). Originally, a total of four ships were planned, but eventually, only one was completed due to the availability of newer designs.
Type 614 research vessel is a type of Chinese research vessel in service with the People's Liberation Army Navy (PLAN). The ship has two derivatives, one is in weather ship configuration, and the other in oceanographic research ship configuration. Type 614 research vessel has been replaced by Type 625.
Type 922 rescue and salvage ship is a series of rescue and salvage ships developed by China for the People's Liberation Army Navy (PLAN), and after decades of service they still remain active in other Chinese governmental establishments.
Type 907A torpedo trial craft is a Chinese torpedo trial craft currently in service with the People's Liberation Army Navy (PLAN). After nearly three decades of service, the ship still remains active.
The Type 679 training ship with NATO reporting name Daxin, or 大兴 in Chinese meaning Great Prosper, is a Chinese training ship developed for the People's Liberation Army Navy (PLAN). The ship is more commonly known as Zheng He(Chinese: 郑和), after the Ming dynasty admiral of the same name.
Type 646 hydrographic survey ship with NATO reporting name Kanyang classis a type of survey vessel currently in service with the People's Liberation Army Navy (PLAN).
The Type 636 and its successor Type 636A hydrographic survey ships is type of Chinese survey and research vessel designed to replace earlier Type 625 and Type 635 research vessels, and is currently in service with the People's Liberation Army Navy and Chinese Coast Guard. Type 636 & 636A has received NATO reporting name Shupang class.
The Type 648 repair ship is a Chinese submarine repair ship currently in service with the People's Liberation Army Navy (PLAN). It was one of the two units consisting the proposed mobile repair flotilla, but the floating dry dock with lifting capacity of 2000 tons was never built, and Type 648 repair ship was the one only completed. Type 648 has received with NATO reporting name Dadao class.
Type 595 ocean surveillance ship is the first purposely designed and purposely built ocean surveillance ship developed in China for its People's Liberation Army Navy (PLAN). Designed to replace earlier Shuguang class, Type 595 itself has been replaced by Type 639 in PLAN, but despite over four decades of service, this type of ship still remain active in civilian service, albeit on a much smaller scale.
Type 625 oceanographic research ship is a series of oceanographic research ship developed by China for its People's Liberation Army Navy (PLAN). The series consisted of three models, A, B & C, but A & B are usually grouped together as one because C model differs from Models A & B on much greater scale. Originally designed to replace earlier Type 614, Type 625 has been replaced by its follow-on Type 636, and has since either retired from active service of PLAN and transferred to civilian agencies.
Type 639 is a type of ocean surveillance ship is a type of oceanographic surveillance ship developed by China for its People's Liberation Army Navy (PLAN) to replace earlier Type 595. A single unit of Type 639 with pennant number Bei-diao 992 is currently in service as an oceanographic research ship and five more modified version serving as hydrographic survey ships are designated as Type 639A. Type 639 has received NATO reporting name Kanhai class, 勘海 in Chinese, meaning Surveying Sea.
Chinese Research Ship Beidiao 991 is a research ship that has served both in civilian use and in the People's Liberation Army Navy (PLAN). It was built in the People’s Republic of China (PRC). This ship has the NATO reporting name Kandao, meaning Surveying Island.
References
- ↑ Type 988 AGOS (in Simplified Chinese). June 9, 2017.
- ↑ Type 988
