Chief Mate CoC

It certifies you to serve as chief officer, and usually as second-in-command, on vessels within the tonnage and trading limits of the certificate issued by your flag State. It is also normally the prerequisite for sitting the Master examination, so treat it as the senior deck officer qualification rather than a formality.

Most administrations combine multiple-choice papers with written or constructed-response papers involving calculations and longer answers, followed by an oral examination with one or more examiners. Some also require simulator assessment or approved short courses. Check your administration's current examination syllabus, because the mix varies between flag States.

These vary by administration and are revised from time to time. The official examining body publishes the current paper durations, marking scheme and pass criteria on its own website, and that is the only figure you should rely on. Do not plan around numbers quoted in forums or older study guides.

Substantially harder. The OOW examination tests competence within a defined watchkeeping role; the chief mate examination tests judgement across the whole ship, including stability decisions, cargo planning, legal responsibilities and emergency command. Written answers are expected to show reasoning and reference to regulation, not just a correct final figure.

Most administrations allow re-sitting failed papers, often after a defined interval and sometimes with a limit on attempts or a requirement to repeat related training. The specific rules, waiting periods and any fees are set by your flag State, which publishes them on its official site.

Start with the calculation-heavy areas, stability and cargo operations, because they take the longest to become fluent and support later topics. Then work through navigation and passage planning, law and conventions, and watchkeeping regulations. Leave leadership, safety management and pollution prevention for regular short sessions that you revisit throughout.

Weak arithmetic under time pressure in stability and cargo questions; quoting convention names without knowing what the regulations actually require; vague oral answers that never reach a decision; and poor chartwork discipline in passage appraisal. Examiners also notice candidates who cannot explain why a rule exists, only that it does.

Answer questions aloud, standing, with a colleague acting as examiner, and force yourself to finish each answer with a clear decision and its justification. Practise the scenarios you would face as chief officer: a cargo hold flooding, a crew injury, a pollution incident, a stability concern on loading. Record yourself and listen for rambling.

Certificates are generally issued with a validity period and require revalidation, typically involving recent sea service, medical fitness and up-to-date short courses. The exact requirements and intervals are set by the issuing administration, so confirm them on its official website before your certificate approaches expiry.