The officer second in command to the master, responsible for cargo operations, stability, deck maintenance, and crew safety.
In practice
Beyond cargo, the chief mate is designated the ship's safety officer under SOLAS, responsible for maintaining life-saving appliances, fire detection and suppression systems, and ensuring that safety drills are conducted and recorded. They oversee the planned maintenance system for deck equipment, manage the deck crew's work schedules and training records under MLC 2006, and prepare stability calculations for port state control inspections. The chief mate relieves the master on the navigation bridge during critical manoeuvres and frequently stands a bridge watch, typically the 4–8 watch, during the ocean passage.
Regulatory detail & full definition
The chief mate (also termed first officer or chief officer) is the officer second in command of the deck department and holds a Certificate of Competency as Chief Mate issued under STCW II/2, requiring substantial sea service as officer of the watch and completion of approved management-level training. On a cargo vessel the chief mate's primary domain is cargo operations: planning and supervising loading and discharging, managing trim and stability in accordance with the approved loading manual, and ensuring that the cargo care obligations in bills of lading are met.
Beyond cargo, the chief mate is designated the ship's safety officer under SOLAS, responsible for maintaining life-saving appliances, fire detection and suppression systems, and ensuring that safety drills are conducted and recorded. They oversee the planned maintenance system for deck equipment, manage the deck crew's work schedules and training records under MLC 2006, and prepare stability calculations for port state control inspections. The chief mate relieves the master on the navigation bridge during critical manoeuvres and frequently stands a bridge watch, typically the 4–8 watch, during the ocean passage.