The ABT Summer was an oil tanker sailing under the Liberian flag and built in Ulsan in 1974 under the name Atlantic Baron . They came on 29 May 1991 on its way from Iran to Rotterdam with a cargo of 260,000 tons of crude oil of the sort "Heavy Crude" about 900 nautical miles before Angola on fire. Five of the 32 sailors on board were killed in the accident. After three days, on June 1, 1991, it sank. The wreck could not be located until today.
Estimates of the amount of oil spilled range from 49,000 to 255,000 tons, with the remainder being burned or sunk with the ship.
