Dajiang-class tender

The Yongxingdao #506 ship a Dajiang Class Deep Submergence Rescue Vehicle
Class overview
Builders:	Hudong SY, Shanghai
Operators:	People's Liberation Army Navy
In service:	completed in November 1979 for use
In commission:	first ship started construction in 1975
Completed:	3
General characteristics
Displacement:	10,087 tons full
Length:	512 ft (156 m)
Propulsion:	2 MAN Diesels, 9,000 shp (6,700 kW), 2 shafts
Speed:	surface - 20 knots (37 km/h)
Complement:	308
Aircraft carried:	2 Z-8 Super Frelon helicopters
Aviation facilities:	aft helicopter deck and hangars for 2 Z-8 Super Frelon helicopters

The Type 925 Dajiang (大江) is a type of naval auxiliary ship belonging to the People's Republic of China. Each ship is usually equipped with up to two Type 7103 DSRV class Deep Submergence Rescue Vehicles (DSRVs). The lead ship of the Dajiang class is the Changxingdao. The Type 925 is a submarine tender that can also be used as a submarine rescue ship, and hence, it is designated as a submarine support ship (Qian-Ting Zhi-Yuan Jian, 潜艇支援舰) by Chinese.

Each ship has a crew of 308 sailors and is equipped with an aft helicopter deck and hangars for 2 Z-8 Super Frelon helicopters. These large multi role naval auxiliary ships are the most fexilible type in the Chinese navy, capable of performing a variety of tasks, including serving as a submarine rescue ship (ARS), marine salvage rescue ship (ASR), submarine tender (AS), and surface ship's tender. Two Type 7103 DSRVs can be carried during submarine rescue operations and they are handled by a large crane on the fore deck, though usually, only one Type 7103 DSRV is carried while the slot for the second is used for a Type 7103 training submersible, which is used to simulate stranded submarines in training exercises. The handling system of Type 7103 DSRV is also used for Sea Pole class bathyscaphes and Osprey class submersibles. With only slight modifications, Type 925 Dajiang class is capable of supporting all submersibles and Unmanned underwater vehicles (UUVs) in the Chinese inventory, including: