Type 814A

spy ship A spy ship or reconnaissance vessel is a dedicated ship intended to gather intelligence, usually by means of sophisticated electronic eavesdropping. In a wider sense, any ship intended to gather information could be considered a spy ship. Spy ...

with NATO reporting name Dadie(大谍, meaning Big Spy) is a type of Chinese spy ship in service (as of 2014) 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. PLAN originally issued a requirement of four spy ships to meet its urgent need, after the failure of the earlier cancelled Type 812. To speed up the program, PLAN suggested adopting the hull of Type 635C hydrographic survey ship. The 1st Directorate of the 708th Institute of

China State Shipbuilding Corporation The China State Shipbuilding Corporation (CSSC) is a Chinese shipbuilding conglomerate. Description CSSC is one of the top 10 defence groups in China. It consists of various shipyards, equipment manufacturers, research institutes and shipbu ...

, 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) nowadays, was assigned to design the ship. However, after the design was completed, it was revealed that the design could not meet requirements issued by PLAN during design review. On March 25, 1980, PLAN issued an order to revise the design to 1500 tons, designated as Type 814. On June 30, 1980, the 708th Institute completed the revision. However, due to drastic changes made by PLAN, it was once again revealed during design review that the revised design could not efficiently meet the new requirements issued by PLAN. The designer recommended enlarging the ship by increasing the displacement by twenty percent from 1500 tons to 1800 tons. The recommendation was accepted and in February 1982 the revision was completed, and in August 1982, design was completed. The finalized design is designated as Type 814A. In August 1983, design work for construction was completed and construction began on December 22, 1983. During sea trials, various aircraft and naval warships were deployed in support of trials, including Type 033 submarines,

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Harbin H-5 Harbin (; mnc, , v=Halbin; ) is a sub-provincial city and the provincial capital and the largest city of Heilongjiang province, People's Republic of China, as well as the second largest city by urban population after Shenyang and largest c ...

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Type 051 destroyer The Type 051 destroyer (NATO/OSD Luda-class destroyer) was a class of guided missile destroyers based on the hull of the Soviet deployed by China. It was the first guided missile destroyer fielded by the People's Liberation Army Navy (PLAN) ...

s and Type 403 shore based radars. On-board systems such as acoustic, radar, communication, and optical systems proved satisfactory and the ship was accepted into service in the

North Sea Fleet The Northern Theater Command Navy (), or the North Sea Fleet (NSF; ) is one of the three fleets of the Chinese People's Liberation Army Navy, under the Northern Theater Command. In September 1950 the Qingdao Army Base was redesignated as a naval ...

. Because the previous design was experienced excessive vibration, particular attention in design was given to reduce vibration. Type 814A is designed to withstand wind scale of 12. The name of the ship is ''Bei-Diao'' (北调, meaning North Investigate) 900.

References

{{Ship classes of the Chinese Navy, state=uncollapsed Auxiliary ships of the People's Liberation Army Navy Auxiliary surveillance ship classes