This paper presents the survey results of a sunken oil tanker, Kyung Shin, which sank in the East Sea near Pohang, Korea in 1988. Despite the underwater operation for sealing the oil-leaking holes at the time of the accident, small-scale oil spills have been frequently reported near the sunken position. To assess the risk, a survey using underwater vehicles was carried out for ten days in 2001. It includes optical inspection and hull plate thickness measuring for assessing its corrosion state. Based on the survey results, it is concluded that there is still a little amount of oil leakage from Kyung Shin while the hull plate of the sunken tanker was not corroded severely yet. Additionally, the environmental conditions in which the spilled oil sticks to the shore are also analyzed.