. . . "1Pohang-class corvette" . . . . "1Yugo-class submarine" . "1998 Sokcho submarine" . . "1998 Sokcho submarine incident" . . "accidentally snared in fishing nets near Sokcho" . . . . "one near Sokcho in 1998" . "Loss of North Korean submarine and personnel" . . . "captured by the South Koreans" . "North Korean Yugo-class submarine became entangled in a fishnet" . . . . "1998 Sokcho submarine incident" . "nine crewmen were recovered all dead by gunshot wounds" . . "None" . "1998-06-22" . .