Cheong Hae Jin

ROKS Cheonghaejin (ASR-21) is a dedicated submarine rescue ship operated by the Republic of Korea Navy. It is equipped with a deep submergence rescue vehicle (DSRV) and specialized diving systems to conduct deep-sea rescue and salvage operations. The vessel plays a critical role in supporting South Korea's submarine fleet.

Developed in the early 1990s to support the Republic of Korea Navy's growing submarine force, the ship was built by Daewoo Shipbuilding & Marine Engineering and commissioned in late 1996. It has participated in several notable operations, including the salvage of a sunken North Korean Yugo-class submarine in 1998 and the recovery of the patrol boat Chamsuri 357 in 2002. The vessel remains in active service, providing essential search, rescue, and salvage capabilities.