The sinking of Namyoung-Ho (Korean: 남영호 침몰 사고) was a marine accident that occurred in the sea near South Korea on December 15, 1970.

On December 15, 1970, the South Korean ferryboat Namyoung sank in the Korea Strait.

[1] The vessel was heading from Seogwipo-si to Seongsanpo Port near Busan, before it sank about 28 miles (45 km) away from Yeosu and Jeollanam.

[3] On December 12, 1970, the ferry departed with 338 passengers on board en route to Jeju island from Busan.

Additionally, rescue was delayed as the original SOS from the ferry was either not received or ignored by the Coast Guard, which contributed to the high casualty rate.