Dajiang
Encyclopedia
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 Vehicle
s (DSRVs). The lead ship of the Dajiang class is the Changxingda.
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 ship is the most fexilible type in the Chinese navy, capable of performing a variety of tasks, including serving as submarine rescue ship
(ARS), marine salvage
rescue ships (ASR), submarine tender
(AS), and surface ship's tender
. Two Type 7103 DSRV
s 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 bathyscaphe
s and Osprey class submersible
s. With only slight modifications, Type 925 Dajiang class is capable of supporting all submersibles and Unmanned underwater vehicle
s (UUVs) in the Chinese inventory, including:
During the Chinese ICBM test in the early 1980's, one of the Type 925 Dajiang class was converted as missile instrumentation support ship and temporarily renamed as Yuanwang-3 (远望-3) to support the test, and after the conclusion of the test, the unit was converted back to its original role with the name consequently changed back.
With a displacement of 10,087 tons full, and a length of 512½ feet, this ship can reach a speed of 20 knots (39 km/h) powered by two MAN diesels
producing 9000 bhp delivered to the two driveshaft
s. The ships were built by Hudong SY, Shanghai
. The Dajiang class submarine ship has three vessels. They are named as follows:
People's Republic of China
China , officially the People's Republic of China , is the most populous country in the world, with over 1.3 billion citizens. Located in East Asia, the country covers approximately 9.6 million square kilometres...
. Each ship is usually equipped with up to two Type 7103 DSRV
Type 7103 DSRV
The Type 7103 Deep Submergence Rescue Vehicle is a submarine rescue submersible of the People's Liberation Army Navy of the People's Republic of China .-Origin:...
class Deep Submergence Rescue Vehicle
Deep Submergence Rescue Vehicle
A Deep Submergence Rescue Vehicle is a type of Deep Submergence Vehicle used for rescue of downed submarines and clandestine missions. While DSRV is the term most often used by the United States Navy other nations have different designations for their vehicles.- Chinese models :The People's...
s (DSRVs). The lead ship of the Dajiang class is the Changxingda.
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
Aérospatiale Super Frelon
The Aérospatiale SA 321 Super Frelon is a three-engined heavy transport helicopter produced by Aérospatiale of France. The helicopter is still in use in China where the locally produced version is known as the Z-8. "Frelon" is French for hornet....
. These large multi role naval auxiliary ship is the most fexilible type in the Chinese navy, capable of performing a variety of tasks, including serving as submarine rescue ship
Submarine rescue ship
A Submarine rescue ship serves as a surface support ship for submarine rescue and deep-sea salvage operations. Methods employed are the McCann Rescue Chamber, Deep Submergence Rescue Vehicles and deep sea diving operations....
(ARS), marine salvage
Marine salvage
Marine salvage is the process of rescuing a ship, its cargo, or other property from peril. Salvage encompasses rescue towing, refloating a sunken or grounded vessel, or patching or repairing a ship...
rescue ships (ASR), submarine tender
Submarine tender
A submarine tender is a type of ship that supplies and supports submarines.Submarines are small compared to most oceangoing vessels, and generally do not have the ability to carry large amounts of food, fuel, torpedoes, and other supplies, nor to carry a full array of maintenance equipment and...
(AS), and surface ship's tender
Ship's tender
A ship's tender, usually referred to as a tender, is a boat, or a larger ship used to service a ship, generally by transporting people and/or supplies to and from shore or another ship...
. Two Type 7103 DSRV
Type 7103 DSRV
The Type 7103 Deep Submergence Rescue Vehicle is a submarine rescue submersible of the People's Liberation Army Navy of the People's Republic of China .-Origin:...
s can be carried during submarine
Submarine
A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which has more limited underwater capability...
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 bathyscaphe
Sea Pole class bathyscaphe
The Sea Pole class bathyscaphe is a class of little known bathyscaphe of the People's Republic of China , capable of diving up to 7,000 metres, covering 99.8% of the oceanic floor of the world...
s and Osprey class submersible
Osprey class submersible
Osprey class submersible is a class of submersible of the People's Liberation Army Navy specially designed to perform torpedo retrieving missions at test ranges...
s. With only slight modifications, Type 925 Dajiang class is capable of supporting all submersibles and Unmanned underwater vehicle
Unmanned underwater vehicle
Unmanned underwater vehicles are any vehicles that are able to operate underwater without a human occupant. These vehicles may be divided into two categories, Remotely operated underwater vehicles , which are controlled by a remote human operator, and Autonomous underwater vehicles , which...
s (UUVs) in the Chinese inventory, including:
- Mobile diving bell
- QSZ-II submersible
- 8A4 ROUVs
- RECON-IV ROUVs
- 7B8 ROUVs
- Goldfish class ROUVGoldfish class ROUVThe Goldfish class remotely operated underwater vehicle is a class of light ROUV developed by the Shenyang Institute of Automation of the Chinese Academy of Science...
s - HR-01 ROUV
- HR-02 ROUV
- JH-01 ROUV
- SJT-5 ROUV
- SJT-10 ROUV
- SJT-40 ROUV
- Sea Dragon-I ROUV
- Sea Dragon-II ROUV
- Arctic class ARV
- Explorer AUVExplorer AUVExplorer Autonomous underwater vehicle is a Chinese AUV developed in the People's Republic of China , first entering service in November 1994, and it should not be confused with another two Anglo-American AUVs that share the same name: the American built by Woods Hole Oceanographic Institution,...
- WZODA AUV
- CR-01 AUV
- CR-01A AUV
- CR-02 AUV
- Intelligent Water class AUVIntelligent Water class AUVIntelligence class autonomous underwater vehicle is a class of little known ROUV developed by of Harbin Engineering University for the People's Liberation Army Navy of the People's Republic of China ....
During the Chinese ICBM test in the early 1980's, one of the Type 925 Dajiang class was converted as missile instrumentation support ship and temporarily renamed as Yuanwang-3 (远望-3) to support the test, and after the conclusion of the test, the unit was converted back to its original role with the name consequently changed back.
With a displacement of 10,087 tons full, and a length of 512½ feet, this ship can reach a speed of 20 knots (39 km/h) powered by two MAN diesels
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
producing 9000 bhp delivered to the two driveshaft
Driveshaft
A drive shaft, driveshaft, driving shaft, propeller shaft, or Cardan shaft is a mechanical component for transmitting torque and rotation, usually used to connect other components of a drive train that cannot be connected directly because of distance or the need to allow for relative movement...
s. The ships were built by Hudong SY, Shanghai
Shanghai
Shanghai is the largest city by population in China and the largest city proper in the world. It is one of the four province-level municipalities in the People's Republic of China, with a total population of over 23 million as of 2010...
. The Dajiang class submarine ship has three vessels. They are named as follows:
- Changxingdao #121 (built in 1976)
- Chongmingdao #302
- Yongxingdao #506