The Dolgorae-class submarine (Hangul: 돌고래급 잠수정) was a type of midget submarine designed and acquired for the Republic of Korea Navy. All three units are now retired.

These midget submarines were the first South Korean submarines of any type. They were acquired primarily to obtain initial experience with the basics of operating a submarine force. The secondary mission to train surface ASW ships in the detection of North Korean midget submarines.

Replacement In November 2011, South Korea unveiled plans for a new mini-sub designated KSS-500A. In September 2015, Jane's.com reported that Hyundai Heavy Industries started construction of a single long HDS-400 mini submarine for an unnamed naval customer.

Ships in the class Name Builder Launched Commissioned Decommissioned Status Korea Takoma Shipyard 2 April 1982 19852003 1987? 1990 2016 Retired 1988? 1991 2016 Retired; museum ship at Seoul Battleship Park

In November 2017, SSM-053 was opened as a museum ship in the Seoul Battleship Park beside the Han River in western Seoul.

References The information in this article is based on that in its Korean equivalent.

External links