MTS Oceanos was a French-built and Greek-owned cruise ship that sank in 1991 when she suffered uncontrolled flooding. Her captain, Yiannis Avranas, and some of the crew were convicted of negligence for fleeing the ship without helping the passengers, who were subsequently rescued thanks to the efforts of the ship's entertainers, who made a mayday transmission, launched lifeboats, and helped South African Marines land on the ship from naval helicopters. All 571 passengers and crew survived.