Certificates: CoC, CoE and the documents behind them
The convention's currency is the Certificate of Competency, issued by an administration to masters, officers and certain ratings against the standards of competence set out in the STCW Code. When a seafarer holds a Certificate of Competency from one country and sails under another country's flag, that flag issues a Certificate of Endorsement recognizing the original. This is why crew files fill with paired documents, and why an expired endorsement can ground a fully qualified officer. Around the Certificate of Competency sit the supporting layers. Basic safety training for everyone. Certificates of Proficiency for specific duties, including advanced firefighting, survival craft and rescue boats, tanker and gas-fuelled ship qualifications, and security duties. Medical fitness certificates. And revalidation: under Regulation I/11, masters and officers must revalidate at intervals not exceeding five years, normally by demonstrating continued professional competence through recent seagoing service. Revalidation is where lapses most often occur.
Watchkeeping and rest: the operational core
STCW is not only about paper. It prescribes fitness for duty. Section A-VIII/1 of the STCW Code sets a minimum of 10 hours of rest in any 24-hour period and 77 hours in any 7-day period. The rest may be divided into no more than two periods, one of which must be at least 6 hours, and the interval between consecutive periods of rest must not exceed 14 hours. The regime exists because fatigue is a proven causal factor in groundings and collisions. Inspectors reconcile rest hour records against the ship's actual operations: port calls, drills, cargo work, bunkering. Records that show perfect compliance through a demanding port rotation invite exactly the scrutiny they were meant to avoid. Watch arrangements themselves, meaning lookout, bridge and engine room manning and the composition of the watch in different conditions, come from the same chapter. They connect directly to the Minimum Safe Manning Document, which the flag administration issues under SOLAS Regulation V/14 and IMO resolution A.1047(27).
How it is enforced
Flag States implement STCW through their national maritime administrations. The IMO Maritime Safety Committee maintains the list of Parties confirmed as giving full and complete effect to the convention, which is the basis on which administrations recognize each other's certificates. At the sharp end, Port State Control checks that every crew member's certificates are valid and endorsed, that they match the Minimum Safe Manning Document, and that watch schedules and rest records hold together. Crew certification deficiencies are common, and a manning shortfall against the safe manning document is serious. For operators the discipline is a live certificate matrix. Expiry dates, endorsement status, medical validity and course refreshers tracked ship by ship, with lead time built in, because replacing an expiring qualification mid-rotation is far harder than renewing it early.
Where the convention is heading
The IMO is running a comprehensive review of the STCW Convention and Code. It is expected to address competencies for alternative fuels and new technologies, seafarer wellbeing, harassment and bullying, and the structure of the Code itself. The roadmaps endorsed by the Maritime Safety Committee in June 2025 target completion of the review in 2029 to 2030, with the Committee considering the revised treaty for approval in 2029 or 2030 and an adoption date still to be decided. The Sub-Committee on Human Element, Training and Watchkeeping worked through chapters II and III at HTW 12 in February 2026, and a second intersessional working group met in March 2026 on chapters IV, VI and the remainder of chapter I. Meanwhile MLC 2006 covers overlapping ground on hours and conditions of employment, and the two regimes are enforced side by side. Companies that treat training as a competence system, mapping actual shipboard tasks to qualifications and closing the gaps proactively, rather than as a certificate collection exercise, have less to rebuild when the amendments land.