1998 Yeosu submersible incident

The 1998 Yeosu submersible incident was a naval skirmish that occurred off of the southern coast of South Korea between 17 and 18 December 1998. On the evening of 17 December, a South Korean observation post sighted a North Korean semi-submersible naval vessel in the vicinity of the city of Yeosu. The semi-submersible was discovered and sunk during a subsequent search and skirmish on the morning of 18 December.