title: ROKS Cheonghaejin (ASR-21)
text: # ROKS Cheonghaejin (ASR-21)
  
  ROKS Cheonghaejin (ASR-21) is the only ship of the Cheonghaejin-class submarine rescue ship in the Republic of Korea Navy. She is named after the military headquarter, Cheonghaejin.
  
  ## Design
  
  Her operations include rescuing trapped sailors in submarines, naval operation support for submarines, underwater research and mapping support, and recovery of sunk vessels. It is equipped with a deep submergence rescue vehicle (DSRV) that operates up to 500 metres (1,600 ft), and a rescue chamber that holds up to nine people.
  
  Once all nine Son Wonil-class submarines are delivered to the Republic of Korea Navy, another ASR ship of the same class is planned to be built.
  
  ## Construction and career
  
  ROKS Cheonghaejin was launched on 18 October 1995 by Daewoo Shipbuilding and commissioned on 2 December 1996.
  
  She salvaged a North Korean Yugo-class submarine in 1998.
  
  She salvaged Chamsuri-class patrol boat #357 that was sunk during the naval clash in 2002 with North Korea.
  
  ## Gallery
  
  * ROKS Gwangyang on 6 April 2010
  