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The third officer career path is the entry point into the deck officer ranks — and for most seafarers who’ve earned their OOW certificate, it’s where a bridge career actually begins. This article covers what the role involves, the qualifications you need, what you’ll earn, and how to move up from there.

What Does a Third Officer Do?

Additionally, the third officer is the most junior deck officer on a vessel. You report to the Chief Officer and stand the navigation watch — typically the 08-12 watch. But the role carries more responsibility than “junior” implies.

Your primary safety duty: you are the ship’s lifeboat and fire-fighting officer. You maintain and inspect all LSA (life-saving appliances) and fire-fighting equipment. This isn’t optional — it’s your job. Flag state surveyors will inspect it. PSC officers will check your records.

Day-to-day responsibilities include:

• Standing bridge watches and maintaining a safe navigational watch
• Maintaining the LSA and FFA (fire-fighting appliances) inventory and records
• Updating charts and nautical publications (NAVTEX, Notices to Mariners)
• Conducting emergency drills — lifeboat, fire, MOB
• GMDSS operations and watch keeping
• Cargo operations support on applicable vessel types

Qualifications Required for a Third Officer Role

Furthermore, to serve as a third officer on an internationally trading vessel, you need an Officer of the Watch (OOW) Deck certificate — STCW Regulation II/1. This is the mandatory minimum under the STCW Convention.

Most cadets obtain this after completing a maritime academy programme (typically 3–4 years) including approved sea service of at least 12 months on board. The exact requirements vary by flag state, but the STCW framework applies universally.

Supporting certificates you’ll need:

• STCW Basic Safety Training (BST) — fire, first aid, survival, personal safety
• GMDSS GOC or ROC — mandatory for any deck officer
• Advanced Fire Fighting — required at officer level
• Medical First Aid — required for OOW certificate holders
• ENG1 or equivalent flag state medical
• Proficiency in Survival Craft and Rescue Boats (PSCRB)

For a full breakdown of what STCW requires, see our STCW certification guide.

Third Officer Career Path: Salary by Vessel Type

Third officer salary depends on vessel type, flag state, and the crewing company. On deep-sea merchant vessels, the typical range runs from $1,800 to $4,500 per month basic wage, before overtime and leave pay.

However, iTF/ILO minimum rates for 2026 set a floor, but most reputable shipping companies pay above it. Specialist vessel types — tankers, LNG carriers, offshore vessels — pay more than bulk carriers or container feeders at the same rank.

Approximate monthly basic by vessel type:

• LNG carrier: $3,000–$4,500
• Chemical/product tanker: $2,500–$3,800
• Container vessel: $2,200–$3,200
• Bulk carrier: $1,800–$2,800
• Cruise ship: $1,500–$2,500 plus benefits

For a full comparison across ranks and vessel types, see our seafarer salary guide by rank.

How to Progress From Third Officer to Master

In addition, the third officer career path moves through four stages on the deck side:

1. Third Officer — entry OOW role, 18–30 months sea service
2. Second Officer — often the chief navigator, responsible for voyage planning and charts
3. Chief Officer — requires STCW II/2 Chief Mate certificate, 12+ months as Second Officer
4. Master / Captain — requires STCW II/2 Master certificate, 12+ months as Chief Officer

The UK MCA, for example, requires at least 36 months total sea service on eligible vessels — with at least 18 months at OOW level — to sit the Chief Mate oral examination. Other flag states have similar thresholds. Check your flag state’s specific requirements early; they determine your study timeline.

“The third officer years are where you build your core seamanship. The officers who take LSA and FFA seriously at that rank — who actually know the equipment rather than just signing the checklist — are the ones who become confident Chief Officers later,” says a Master Mariner with 22 years at sea, currently serving as a maritime trainer.

Choosing the Right Vessel Type as a New Third Officer

Your first ship after getting your OOW certificate shapes the skills you build. This matters more than most cadets realise.

Notably, container vessels offer frequent port calls and high-traffic navigating — good for building bridge confidence fast. Bulk carriers have longer passages and a steadier routine, which suits officers who want uninterrupted time to study for the next certificate. Tankers require specific endorsements (Basic Tanker Training, Advanced Liquid Cargo) but pay more from the start.

If LNG is your long-term target, some operators run structured cadet-to-officer programmes where you build specialist knowledge from the beginning. Research this before signing your first Third Officer contract — not after.

How to Find Third Officer Jobs

In practice, most Third Officer positions fill through crewing agencies, manning companies, and direct applications to shipping companies. The Philippine manning industry places a large number of Third Officers globally. For officers from other nationalities, direct contact with shipping companies in your preferred sector is often the most effective route.

Prepare a solid seafarer CV with your certificates, sea service record, and the vessel types you’ve worked on. Maritime job boards list Third Officer vacancies regularly — you can filter by rank and vessel type to find relevant openings quickly.

Frequently Asked Questions

What is the minimum STCW certificate required to serve as a Third Officer?
You need an Officer of the Watch (OOW) Deck certificate under STCW Regulation II/1. This requires completing an approved maritime education programme and at least 12 months of approved sea service as a cadet.

How long does it take to get promoted from Third Officer to Second Officer?
Most officers spend 18–30 months as a Third Officer before progressing. Promotion timing depends on flag state sea service requirements, available vacancies with your company, and how quickly you accumulate the sea time needed for your next certificate.

What is a Third Officer responsible for on board?
The Third Officer is the ship’s safety equipment officer — maintaining and inspecting life-saving appliances and fire-fighting equipment. You also stand bridge navigational watches, update charts and publications, and run emergency drills.

How much does a Third Officer earn per month?
Third Officer salary ranges from approximately $1,800 to $4,500 per month depending on vessel type. LNG carriers and chemical tankers pay at the higher end; bulk carriers and general cargo vessels at the lower end.

Can a Third Officer become a Captain?
Yes. The deck officer career path runs Third Officer, Second Officer, Chief Officer, and then Master. Most deck officers reach Master within 10–15 years of getting their OOW certificate, depending on sea time accumulation, flag state requirements, and available opportunities.

Conclusion

The third officer career path starts with an OOW certificate and ends — for those who stay the course — on the bridge as Master. The rank teaches the fundamentals: safety equipment, watch keeping, navigation under senior supervision. Get those right, and progression follows.

Looking for your next step at sea? Browse Third Officer and deck officer vacancies on Seaplify.

For official maritime standards and further information, visit the International Maritime Organization (IMO).