How to Get an Officer of the Watch (OOW) Certificate of Competency
The Officer of the Watch certificate, formally the Certificate of Competency (CoC) as Officer in Charge of a Navigational Watch on ships of 500 gross tonnage (GT) or more, is the entry qualification for a deck officer career. It is issued under Regulation II/1 of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW), 1978, as amended (Manila 2010). It is eligible for recognition abroad when the issuing country is on the International Maritime Organization (IMO) "White List" of Parties giving full effect to the Convention; a CoC from elsewhere may not be recognised.
This guide covers the international minimums; always confirm details with your flag administration.
Entry requirements under STCW Regulation II/1
To qualify for an OOW (deck) CoC you must:
- Be not less than 18 years of age (Regulation II/1, paragraph 2.1).
- Complete approved education and training covering the competences of STCW Section A-II/1 at the operational level.
- Complete approved seagoing service. Two routes exist:
- Cadet route: not less than 12 months of seagoing service within an approved training programme, documented in an approved Training Record Book (TRB). The International Chamber of Shipping (ICS) record books are the industry-standard format.
- Rating route: not less than 36 months of approved seagoing service, with the education and training usually completed in blocks between contracts.
- Perform bridge watchkeeping duties under the supervision of the master or a qualified officer for at least 6 months within that service.
- Hold a valid medical fitness certificate under STCW Regulation I/9 and Section A-I/9, consistent with the Maritime Labour Convention, 2006 (MLC), Standard A1.2: maximum validity 2 years (1 year under 18), colour vision up to 6 years. Some flags require their own format; the UK Maritime and Coastguard Agency (MCA), for example, accepts only the ENG1 or listed equivalents.
- Meet the Global Maritime Distress and Safety System (GMDSS) requirements of STCW Regulation IV/2, in practice a GMDSS General Operator's Certificate (GOC) held before the CoC is issued.
The TRB is the legal evidence of your onboard training, and examiners read it. Get every task signed as you go; an incomplete book is the most common reason an application stalls.
Step-by-step certification process
- Choose the administration that will issue your CoC; pick a Party on the IMO White List.
- Enrol in an approved programme at a maritime academy, university or maritime education and training (MET) centre. Confirm the approval in writing, not from marketing materials.
- Pass the medical examination with a doctor recognised by the administration, and complete STCW Regulation VI/1 Basic Safety Training and security training, before your first sea phase as a cadet.
- Accumulate sea service. Keep the TRB current and collect sea service testimonials from each ship.
- Complete the ancillary courses: GMDSS GOC, medical first aid, survival craft, advanced firefighting, radar, Automatic Radar Plotting Aid (ARPA), Electronic Chart Display and Information System (ECDIS), and Human Element, Leadership and Management (HELM) operational.
- Pass the final assessment against the Section A-II/1 standard. STCW leaves assessment methods to the administration; most examine in writing and orally, probing the International Regulations for Preventing Collisions at Sea (COLREG) in live scenarios, emergency response as OOW, and the limits of your equipment.
- Apply for the CoC. Submit education records, sea service proof, medical certificate, course certificates, passport, seaman's book, and a Seafarer's Identity Document under International Labour Organization (ILO) Convention No. 185 where issued.
- Obtain flag endorsements if needed (see below).
Realistic timeline: 3 to 4 years on the academy route, 4 to 6 on the rating route, then two weeks to three months from assessment to certificate in hand.
Mandatory STCW training for the OOW certificate
| Training | STCW reference | Refresher cycle |
|---|---|---|
| Basic Safety Training (survival, firefighting, first aid, personal safety) | Reg VI/1, Section A-VI/1 | Evidence of competence every 5 years |
| Proficiency in Survival Craft and Rescue Boats (PSCRB) | Reg VI/2, Section A-VI/2-1 | Evidence of competence every 5 years |
| Advanced Firefighting | Reg VI/3, Section A-VI/3 | Evidence of competence every 5 years |
| Medical First Aid | Reg VI/4, Section A-VI/4-1 | Per flag practice |
| Security Awareness / Designated Security Duties | Reg VI/6, Sections A-VI/6-1 and A-VI/6-2 | No expiry under STCW; some flags require refreshers |
| GMDSS General Operator's Certificate | Reg IV/2 | Endorsement revalidated every 5 years |
| Radar and ARPA training | Competence under Section A-II/1 | Course certificate per flag practice |
| ECDIS training | Competence under Section A-II/1 | Generic plus type-specific per flag practice |
| Leadership and Teamwork (HELM operational) | Section A-II/1 | One-time at operational level |
Under Regulation III/10 of the International Convention for the Safety of Life at Sea (SOLAS), every survival craft needs a certificated person in charge, usually you on the muster list; that is why PSCRB matters. Security awareness (A-VI/6-1) is the minimum for all seafarers; officers usually hold designated security duties, so take A-VI/6-2 as well.
Tanker (Regulation V/1-1, V/1-2), passenger ship (Regulation V/2), IGF Code (Regulation V/3) and polar waters (Regulation V/4) training, plus dynamic positioning (DP) under the Nautical Institute scheme, are not required for the CoC but widen your vacancy range.
Switching flags: endorsements under Regulation I/10
A national CoC does not by itself entitle you to sail under a foreign flag: under STCW Regulation I/10 the flag state recognises it by issuing an endorsement. Panama, Liberia and the Marshall Islands run this through the shipowner or manning agent. Two practical points:
- Regulation I/10 lets you serve up to 3 months on a valid foreign CoC while the endorsement is processed, provided you carry proof of application, commonly a Certificate of Receipt of Application (CRA), issued within days. Do not board without it.
- The endorsement expires with the underlying CoC: revalidate the national certificate first, then renew each flag endorsement, and track the dates separately.
Revalidation: the 5-year cycle
An OOW CoC is valid for a maximum of 5 years. Revalidation under STCW Regulation I/11 and Section A-I/11 requires proof of continued competence by one of the following:
- Approved seagoing service of at least 12 months in total during the preceding 5 years, or
- At least 3 months of approved seagoing service during the 6 months immediately before revalidation, or
- An administration-approved alternative: an approved refresher course, an approved test, or service in an equivalent or lower capacity accepted by the flag.
Alongside the CoC, budget for the rest of the stack: 5-year refresher evidence for Regulation VI/1, VI/2 and VI/3 training, GMDSS GOC revalidation, a medical certificate that never runs longer than 2 years, and fresh flag endorsements, which cannot outlive the underlying certificate.
A third officer nearing the end of the first cycle should start the paperwork 6 to 9 months before expiry: sea service letters take time, and some administrations queue applications for months. An expired CoC means an expired endorsement on every flag.
FAQ
Can I go deep-sea with a near-coastal certificate for ships under 500 GT? No. The STCW Regulation II/3 certificate is limited to ships under 500 GT in a near-coastal area defined by the issuing flag, and it rarely transfers between flags. Unlimited trading requires Regulation II/1. Some administrations offer an upgrade path with extra sea time and examination; ask yours.
How long does a flag endorsement take, and can I join before it is issued? The CRA usually arrives within days of a complete application, and under STCW Regulation I/10 you may then serve up to 3 months on your valid national CoC while the endorsement is processed. Joining without either document is a detainable deficiency in port state control.
Do I need separate ECDIS and HELM certificates if they are covered by A-II/1? The competences sit inside Section A-II/1, but most administrations require separate course certificates as evidence, and shipowners ask for them at recruitment. Check your flag for type-specific ECDIS familiarisation policy.
What happens if my medical certificate expires during a voyage? Under STCW Regulation I/9 and MLC Standard A1.2 you may continue until the next port with a recognised doctor, for no longer than 3 months. It is a bridge measure, not a renewal; do not sign on with a certificate expiring mid-contract.
Full document checklist for this rank, with validity periods and normative references: Officer of the Watch documents.