SOLAS is the key international maritime treaty that sets minimum safety standards for construction, equipment and operation of merchant ships. It was first adopted in 1914 in response to the Titanic disaster and has undergone several revisions, with the latest in 1974. The convention includes regulations across 12 chapters addressing issues like ship construction, lifesaving appliances, radio equipment, safety of navigation and carriage of cargoes. Port state control inspections help enforce SOLAS standards by inspecting foreign ships in national ports to verify their compliance with international regulations.