The sinking of MV Teratai Prima occurred on January 11, 2009, around 04:00 local time (January 10, 21:00 UTC) when a ferry carrying more than 300 people capsized in the Makassar Strait off West Sulawesi, Survivors stated that the ferry had been slammed by 4-metre (13 ft) waves twice. The first one hit so hard that the ship became unbalanced (witnesses said the angle approached 30 degrees), before another wave hit from a different direction and sank the vessel.