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About this exam

The Ghana Maritime Authority Officer of the Watch (Deck) Certificate of Competency is the national credential that lets a deck officer stand a navigational watch on Ghana-flagged vessels and, through STCW recognition arrangements, on many foreign-flagged ships. It is aimed at cadets and ratings who have completed approved sea service and an approved education and training programme and are moving into their first officer role. The examination tests the full STCW deck function at operational level: passage planning and position fixing, meteorology and weather routing, ship construction and stability, cargo handling and stowage, ship operations and personnel management, deck-level marine engineering, maritime law and conventions, shipboard safety and emergency procedures, and GMDSS communications. Expect a mixture of multiple-choice papers, written and descriptive answers, and an oral examination in which examiners probe your practical judgement rather than memorised definitions. Preparation works best as a structured programme: work through an approved course syllabus, keep a notebook of worked calculations for stability, cargo and compass work, practise chart-based passage planning under time pressure, and rehearse oral answers aloud with a mentor. Sea time and a genuine watchkeeping log matter as much as textbooks. The Authority publishes current examination schedules, fees and administrative requirements on its official website, and candidates should confirm those details directly with the GMA before applying.

What you'll study

Common questions

About GMA OOW Deck preparation

What is the format of the GMA OOW Deck examination?

Candidates sit written papers, including multiple-choice and descriptive questions, across the nine subject areas, followed by an oral examination with deck examiners. Some subjects may be combined into single papers. The Authority publishes the current paper structure and timetable, so confirm the exact arrangement for your sitting on the GMA website.

How long does the examination take and when are sittings held?

Sitting dates, paper durations and application deadlines are set by the Ghana Maritime Authority and can change between cycles. Rather than rely on second-hand information, check the Authority's official notices for the current examination calendar and apply well before the stated closing date.

How difficult is the OOW Deck examination?

It is demanding but passable with disciplined preparation. Written papers reward accurate calculation and clear structure, while the oral examination exposes shallow knowledge quickly. Candidates who have genuinely stood watches and can explain why they took an action generally cope better than those who only memorised model answers.

Which subject should I study first?

Start with navigation and stability, because they underpin calculations used elsewhere and take longest to master. Then build in meteorology, cargo and ship operations. Treat law, safety and GMDSS as ongoing reading rather than a final cram, since they reward steady revision and feed directly into oral questions.

Where do candidates most often lose marks?

Common weaknesses are careless units in stability and cargo calculations, vague passage plans without proper contingency, and oral answers that describe a regulation but not the action taken on board. Also frequent: poor time allocation in written papers and an inability to explain the reasoning behind a calculated answer.

What happens if I fail a paper?

Retake arrangements, including whether you may resit a single paper or must repeat the whole examination, are governed by the Authority's current examination regulations. The GMA publishes these rules and any applicable fees, so confirm your position with them before rebooking rather than assuming a general rule applies.

How much sea service do I need before sitting?

Approved sea service and an approved training programme are prerequisites for certification under STCW. The exact required duration, the acceptable vessel types and how service is verified are specified by the Ghana Maritime Authority. Check the current requirements on its website and keep your watchkeeping and discharge records complete and signed.

How should I prepare for the oral examination?

Practise aloud with an experienced officer and answer in the sequence you would act: assess, decide, act, report. Expect follow-up questions on why you chose a course of action, what you would do if it failed, and who you would inform. Be ready to sketch manoeuvres, explain stability limits and describe emergency drills from memory.

Is the GMA OOW Deck certificate recognised outside Ghana?

Recognition depends on the flag State and on STCW arrangements in force at the time. Holding a Ghanaian certificate does not automatically guarantee acceptance elsewhere, and some administrations require a flag endorsement or additional verification. Confirm recognition directly with the flag State you intend to sail under.

How long is the certificate valid and what is required to revalidate?

Validity periods and revalidation requirements, including medical fitness, recent sea service or refresher training, are set by the Ghana Maritime Authority and follow STCW provisions. Because these details change, check the Authority's current guidance before your certificate approaches expiry so you can plan any refresher courses in advance.