Dulaji-class research ship

The Dulaji class are a class of environmental research ships (AGER) currently in service with the People's Liberation Army Navy (PLAN),[1][2][3][4] and the design is also modified for cable layer (YRC) in PLAN service,[1][2][3][4] with both versions have received the same NATO reporting name Dulaji class because they share the same hull.[1][2][3][4] The exact type of this class remain unknown as of 2022, because no official information has been released, despite the ships have already been in service for more than a decade.[5] In addition to the usual task of conducting regular environmental sampling, monitoring/surveillance and research missions, these ships are also tasked with additional task of sewer transfer and treatment from other ships to prevent sewer onboard other ships from overflowing into the sea and thus causing pollution, and thus these ships also act as sewer vessels for vessel sewage discharging.[5][6]

History
PRC
StatusIn service
General characteristics
Class and typeDulaji class
Displacement300 long tons (300 t)
Sensors and
processing systems		Navigation radar
Electronic warfare
& decoys		None
ArmamentNone
Aircraft carriedNone
Aviation facilitiesNone

Ships of this class in PLAN service are designated by a combination of two Chinese characters followed by a two-digit number. For the environmental research version, the second Chinese character is Jian[1][2][3][4](监), meaning monitor in Chinese, since its primary duties included monitoring environment. For the cable layer version, the second Chinese character is Lan[1][2][3][4](缆), meaning cable (for communication & power) in Chinese, since its primary duties are laying & maintaining communication and power cables. The first Chinese character denotes which fleet the ship is service with, with East (Dong, 东) for East Sea Fleet (ESF), North (Bei, 北) for North Sea Fleet (NSF), and South (Nan, 南) for South Sea Fleet (SSF). However, the pennant numbers are subject to change due to changes of Chinese naval ships naming convention, or when units are transferred to different fleets. Specification:[1][2][3][4][5][6]

  • Length: 30 meter
  • Displacement: 300 ton

Ships of the environmental research version (AGER):

Type NATO designation Pennant No. Name
(English)		 Name
(Han 中文)		 Commissioned Displacement Fleet Status
Dulaji class environmental research ship (AGER)Dulaji classBei-Jian 04North Monitor 04北监 04 ?300 tNorth Sea FleetActive
Bei-Jian 10North Monitor 10北监 10 ?300 tNorth Sea FleetActive
Dong-Jian 06East Monitor 06东监 06 ?300 tEast Sea FleetActive
Nan-Jian 03South Monitor 03南监 03 ?300 tSouth Sea FleetActive

Ships of the cable layer version (YRC):

Type NATO designation Pennant No. Name
(English)		 Name
(Han 中文)		 Commissioned Displacement Fleet Status
Dulaji class cable layer (YRC)Dulaji classBei-Lan 768North Cable 768北缆 768 ?300 tNorth Sea FleetActive
Bei-Lan 769North Cable 769北缆 769 ?300 tNorth Sea FleetActive
Dong-Lan 884East Cable 884东缆 884 ?300 tEast Sea FleetActive
Dong-Lan 885East Cable 885东缆 885 ?300 tEast Sea FleetActive
Nan-Lan 235South Cable 235南缆 235 ?300 tSouth Sea FleetActive

References
  1. "PLANS recognition guide 2018". July 16, 2018.
  2. "PLANS recognition guide 2019". February 19, 2020.
  3. "PLANS recognition guide 2020". February 19, 2020.
  4. "PLANS recognition guide 2015". August 7, 2015.
  5. "300t class AGER". Retrieved April 3, 2013.
  6. "300-ton class AGER". Archived from the original on March 4, 2016. Retrieved September 10, 2007.
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