Built in June 1996 as a chemical and oil tanker, she was originally named Sanno Maru for Japanese owners.

[1] She maintained this name for the longest throughout her career, but was renamed to Nan Liam 11 in 2018.

[2] This turned her single fixed-pitch propeller and gave a top speed of 12.3 knots (22.8 km/h; 14.2 mph).

Keoyoung Sun departed on March 18,[3] and was bound for Busan New Port.

Soon after, the ship capsized with Initially eight of the crew reported as dead, two missing and one rescued.