Type 635 Class (Yaniai Class) Chinese Hydrographic Survey Ship
Type 635 Class
Hydrographic Research Vessel / Medium Intelligence Ship
Other
Basic Information
Name
Type 635 Class (Yaniai Class) Chinese Hydrographic Survey Ship
Designation
Type 635 Class
Alternate Designation
Type 635 Class; Type 635A/B/C Class; NATO: Yaniai Class
Equipment Type
Hydrographic Research Vessel / Medium Intelligence Ship
Manufacturer
—
Date of Introduction
1970
Description
Type 635 hydrographic survey ship is a series of hydrographic survey ships developed by China for its People's Liberation Army Navy (PLAN). Type 635 series in PLAN service are designated by a combination of two Chinese characters followed by three-digit number. The second Chinese character is Ce (测), meaning survey in Chinese, because these ships are classified as survey ship. The first Chinese character denotes which fleet the ship is service with, with East (Dong, 东) for East Sea Fleet, North (Bei, 北) for North Sea Fleet, and South (Nan, 南) for South Sea Fleet. However, pennant numbers may have changed due to the change of Chinese naval ships naming convention.
Naval & Littoral Specifications
Beam
10.00 m
Draft
3.50 m
Variants
Bei-Ce 943
Commissioned: 1970
Status: Active
Fleet: North Sea Fleet
Dong-Ce 227
Commissioned: 1972
Status: Active
Fleet: East Sea Fleet
Dong-Ce 226
Commissioned: 1982
Status: Active
Fleet: East Sea Fleet
Nan-Ce 427
Commissioned: 1983
Status: Active
Fleet: South Sea Fleet
Nan-Ce 420
Commissioned: 1975
Status: Active
Fleet: South Sea Fleet
System
Alternative Designation
Type 635 Class; Type 635A/B/C Class; NATO: Yaniai Class
Type
Hydrographic Survey Ship
Builder
Jiangzhou Union Shipbuilding Co., Ltd.
Crew
INA
Type 635A/B/C Class
Type 635 A/B/C series with NATO reporting name Yanlai (延来) class is the first batch of the Type 635 series. These ships are sometimes collectively known as Type 635I, because the difference between these models are relatively minor in comparison to the second batch. These ships differ from second batch in that the deck at the stern is circular shaped and they are purely for surveying missions. Construction of the first ship begun in 1970 and some modification was made to the second ship, which was designated as Type 635B, and the first ship was subsequently designated as Type 635A. In 1976, based on the experienced gained from deployment, PLAN required further upgrade of Type 635B and these ships are designated as Type 635C. Design was completed in Jun 1977 and construction for both ships begun simultaneously in October of the same year, and they entered service respectively in 1982 and 1983. Type 635C actually developed later than Type 635II, and they are built by Jiangxi Ruichang Jiangzhou Shipyard, a division of Jiangzhou Union Shipbuilding Co., Ltd.
Type 635II Class
ype 635II is the development of Type 635A/B, and differs from its predecessor in that in addition to hydrographic survey missions, Type 635II is also capable of carrying out ASW and mine laying missions. To carry out these combat missions, additional armament was added. The most obvious visual external difference between Type 635A/B/C (Type 635I) and Type 635 II is that the deck at the stern of Type 635II is in rectangular shape, instead of the circular shape of that of Type 635I. Construction begun in 1970, but due to political turmoil in China, namely, Cultural Revolution, it was not half a decade later was the ship finally delivered.
Dimensions
Length
74.8 m
Beam
10 m
Draft
3.5 m
Displacement, Standard
1,216 tons
Displacement, Full Load
INA
Propulsion System
Engine Name
INA
Engine Type
2 x Diesel Engines
Engine Power
@ 1320 kW (1800 hp) each
Maximum Range
4,000 nautical miles
Maximum Speed
INA
Radar Systems
Navigation Radar
INA
Protection
Active Protection System
None
Countermeasures
No
NBC Water Washdown System
INA
Image Sources
Details
Country of Origin
China
Category
Naval
Naval
Filter Label
T
Classification
Domain
Naval & Littoral
Equipment Status
Active
Dimensions
Length
74.8 m
Width
—
Height
—
Weight
—
Operators (1)
China
Something went wrong. Please reload the page.
Reload