Type 813 spy ship

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History
China
Name	Neptune (852)
Builder	Hudong-Zhonghua Shipbuilding
Laid down	September 1980
Launched	September 1982
Commissioned	April 1983
General characteristics [1]
Class and type	Type 813 Xiangyanghong 21-class spy ship
Displacement	4,590 t (4,520 long tons)
Length	112.22 m (368.2 ft)
Beam	15.2 m (50 ft)
Draft	5.5 m (18 ft)
Propulsion	2 x 9ESDZ43/82B medium/low speed diesel engines @ 3308 kW (4500 hp) w/ 200 rpm
Speed	19 kn (22 mph)
Range	12,000 nmi (14,000 mi) @ 17 kn (20 mph)
Complement	150

Type 813 spy ship is the first purpose-built, indigenously designed spy ship entering service with the People's Liberation Army Navy (PLAN).

Type 813 is the result of the urgent need of specialized spy ship for intelligence gathering missions in the mid-1970s, and to speed up the program, it was decided in October 1976 that the newly constructed spy ship would share the same hull of