The STCW Basic Safety Training consists of four courses covering personal safety, survival, medical emergencies, and firefighting. The courses are designed to satisfy the safety requirements for any mariner on any size of vessel. The training was established by the International Maritime Organization in 1978 and has since been revised several times to improve safety standards worldwide for professional mariners. The entire Basic Safety Training can typically be completed over four days and is required for anyone sailing outside of certain boundary lines or on vessels over 200 gross tons.