MT Unirea was a Romanian-flagged crude oil carrier, one of the biggest ships of the Romanian commercial fleet. She broke up and sank in 1982 in the Bulgarian waters of the Black Sea, 40 nautical miles (74 km) south-south east of the Cape Kaliakra at a depth of 1,400 metres (4,600 ft) after a mysterious explosion. The crew totalled 43 members of which 42 were rescued by Romanian and Soviet boats. The sinking of Unirea was classified by Lloyd's List as the largest ship accident of 1982.