What is the difference between STCW III/1 and III/2?

STCW Regulation III/1 covers the Engineer Officer of the Watch (EOOW) on ships with propulsion machinery of 750 kW or more — this is the entry officer rank, equivalent to the OOW in the engine department. STCW Regulation III/2 covers the Second Engineer and Chief Engineer on ships of 3,000 kW or more — the senior management-level engineers responsible for running and maintaining all machinery.

Do I need a degree to become a marine engineer officer?

Under STCW, no degree is strictly mandated at the international level — an approved seagoing service programme plus sea time and examinations suffices. In practice, most major flag states (Philippines BSMarE, India B.Tech Marine Engineering, UK HNC/HND Marine Engineering through SQA) require a recognised qualification. Norway and some other flags accept competency-based progression without a formal degree. Verify with your flag state.

What is an Engineer Resource Management (ERM) course?

ERM is the engine-department equivalent of Bridge Resource Management. Mandated under STCW Table A-III/1 since the Manila 2010 amendments, it covers engine-room teamwork, situational awareness, communication, and decision-making in abnormal and emergency situations. Required for EOOW (III/1) certification.

Is a high-voltage (HV) endorsement mandatory?

High Voltage (≥ 1,000 V installations) training is required by STCW Table A-III/1 for engineers who may work on high-voltage systems, which are increasingly common on LNG carriers, large container ships, and offshore vessels. Many flag states treat it as mandatory for EOOW on any ship with HV installations; some require it of all engineers applying for III/1. Verify with the issuing flag administration.

How long from engine cadet to Chief Engineer?

From the start of a marine engineering programme to the Chief Engineer CoC typically takes 12–18 years: 4 years at college + 12 months cadetship for EOOW, then approximately 12 months at each subsequent rank (Fourth, Third, Second Engineer) before applying for Chief Engineer. Senior ranks require demonstrated experience in machinery management, and many employers expect additional sea time at Second Engineer level before promoting to Chief.

Marine engineer pathway — Cadet to Chief Engineer

Marine engineers keep the ship moving. The engine department manages propulsion machinery, auxiliary systems (generators, boilers, air compressors, pumps), HVAC, ballast water treatment, and increasingly the ship's energy management and emissions monitoring. The career ladder runs from Engine Cadet through Engineer Officer of the Watch (EOOW, STCW III/1) to Second and Chief Engineer (STCW III/2). The pathway is broadly parallel to the deck side but demands a background in mechanical, electrical, and thermodynamic engineering. Entry is typically via a 4-year marine engineering degree with an embedded cadetship (Philippines, India) or a college-and-sea programme (UK, Norway). The sector has strong demand for qualified engineers across all vessel types — bulk carriers, tankers, container ships, LNG carriers, and cruise.

Progression at each stage

1.Engine Cadet
Certificate
Pre-sea engineering programme + onboard Training Record Book
Sea time
12 months supervised cadetship on-board. Workshop practice (turning, fitting, welding) is commonly required before the sea phase.
Additional certificates
BST (required before sea time counts) · Safety induction · Engineering workshop certification (flag-specific)
Shadows watchkeeping engineers, learns the planned-maintenance system (PMS), participates in port-state inspection preparations. Training Record Book (TRB) signed off by supervising officers.
2.Engineer Officer of the Watch (EOOW) / Fourth EngineerSTCW III/1
Certificate
STCW III/1 EOOW ≥ 750 kW
Sea time
12 months engineering watchkeeping under supervision per STCW Reg III/1.2
Additional certificates
BST · AFF · PSCRB · Medical First Aid · Engineer Resource Management (ERM) · High Voltage (≥ 1,000 V — flag-specific) · Security awareness (VI/6-1)
Stands an 8-hour engine watch (or UMS duty call) on most foreign-going ships. Responsible for the safe operation of propulsion and auxiliary machinery during the watch. Fourth Engineer is the typical job title for the newly certificated EOOW.
3.Third EngineerSTCW III/1
Certificate
STCW III/1 CoC (senior EOOW appointment); some flags issue an intermediate III/1 endorsement
Sea time
12–18 months as EOOW / Fourth Engineer (post-CoC) — flag-state-specific
Additional certificates
Advanced Fire Fighting (AFF) · Tanker Basic (if tanker appointment)
Typically holds the same CoC as EOOW but gains more responsibility: maintenance planning, spare-parts ordering, junior-staff supervision. On some flags (India) this is a formal CoC level; on others it is an operational appointment within the III/1 grade.
4.Second EngineerSTCW III/2
Certificate
STCW III/2 Second Engineer ≥ 3000 kW
Sea time
12 months as EOOW (post-CoC) per STCW Reg III/2 (practical implementation varies — some flags require 12 months specifically as Third Engineer)
Additional certificates
Medical Care (VI/4-2) · HELM Operational + Management · Advanced Tanker endorsement (if applicable) · ISM Code officer familiarisation
Day-to-day running of the engine department. Plans the maintenance work list, leads major overhauls, manages the engine-room team. Reports directly to the Chief Engineer. Department head in the Chief Engineer's absence.
5.Chief EngineerSTCW III/2
Certificate
STCW III/2 Chief Engineer ≥ 3000 kW
Sea time
36 months as EOOW including at least 12 months as Second Engineer per STCW Reg III/2
Additional certificates
HELM Management · ISM / SMS auditor awareness · Ship Security Officer (SSO — flag-specific) · Bunker management (commercially expected)
Department head and engineering officer with overall responsibility for all machinery, propulsion, electrical systems, ballast water treatment, and environmental compliance. Co-signs the ship's Bunker Delivery Note (BDN) and manages the lubrication oil / spare-parts budget. Jointly responsible with the Master for ISM Code SMS compliance.

Training routes by country

Philippines (MARINA)
4-year Bachelor of Science in Marine Engineering (BSMarE) at a MARINA-accredited MHEI including a mandatory 1-year cadetship. MARINA administers the LEOV for EOOW (III/1) and senior engineer examinations. Flag-state-specific — verify with marina.gov.ph. See Filipino seafarer guide.
India (DG Shipping)
B.Tech. Marine Engineering or Graduate MEO (Marine Engineering Officer) course at DG-approved institutions. DG Shipping Class IV (EOOW) → Class III → Class II → Class I (Chief Engineer) examination structure. Flag-state-specific — verify with dgshipping.gov.in. See Indian seafarer guide.
Ukraine (Maradmin)
Marine engineering programmes at ONMU (Odessa) and affiliated academies. State qualifying examinations for EOOW and senior engineer CoCs. Ukraine holds IMO White List status. Flag-state-specific — verify with the Ukrainian Maritime Administration.
United Kingdom (SQA / UK MCA)
SQA (Scottish Qualifications Authority) HNC/HND in Marine Engineering at approved colleges, combined with sea time, leads to MCA Engineer Officer of the Watch (Unlimited) CoC. Class 2 (Second Engineer) and Class 1 (Chief Engineer) via further SQA exams + MCA oral. Flag-state-specific — verify with gov.uk/MCA.
Norway (Sjøfartsdirektoratet)
Maskinoffiser klasse 3 (EOOW equivalent) through Maskinoffiser klasse 1 (Chief Engineer) via maritime college programmes and NMA certification. Flag-state-specific — verify with sdir.no.

Salary ranges

Indicative 2025 monthly ranges (basic wage, foreign-going):

· EOOW / Fourth Engineer — USD 2,600–4,500 depending on vessel type.
· Third Engineer — USD 3,500–5,500.
· Second Engineer — USD 6,000–10,500; USD 10,500–12,000 on VLCC tankers.
· Chief Engineer — USD 10,000–16,200 (VLCC); LNG Chief Engineer can exceed USD 18,000/month on specialist vessels.

See salary database for full breakdowns by vessel type and region.

Career branching options

From Second Engineer or Chief Engineer level, common branching paths include: LNG / gas carrier specialisation (high demand; IGF Code training + gas carrier advanced V/1-2-2); offshore and DP vessel engineering (NI-DPO or DPO endorsement); superintendent / fleet manager roles with a shipowner or management company; class society plan approval; maritime surveyor / technical inspector roles. The Electro-Technical Officer (ETO) pathway (STCW III/6) is a closely related specialism — see ETO career page.

Frequently asked questions

What is the difference between STCW III/1 and III/2?
STCW Regulation III/1 covers the Engineer Officer of the Watch (EOOW) on ships with propulsion machinery of 750 kW or more — this is the entry officer rank, equivalent to the OOW in the engine department. STCW Regulation III/2 covers the Second Engineer and Chief Engineer on ships of 3,000 kW or more — the senior management-level engineers responsible for running and maintaining all machinery.
Do I need a degree to become a marine engineer officer?
Under STCW, no degree is strictly mandated at the international level — an approved seagoing service programme plus sea time and examinations suffices. In practice, most major flag states (Philippines BSMarE, India B.Tech Marine Engineering, UK HNC/HND Marine Engineering through SQA) require a recognised qualification. Norway and some other flags accept competency-based progression without a formal degree. Verify with your flag state.
What is an Engineer Resource Management (ERM) course?
ERM is the engine-department equivalent of Bridge Resource Management. Mandated under STCW Table A-III/1 since the Manila 2010 amendments, it covers engine-room teamwork, situational awareness, communication, and decision-making in abnormal and emergency situations. Required for EOOW (III/1) certification.
Is a high-voltage (HV) endorsement mandatory?
High Voltage (≥ 1,000 V installations) training is required by STCW Table A-III/1 for engineers who may work on high-voltage systems, which are increasingly common on LNG carriers, large container ships, and offshore vessels. Many flag states treat it as mandatory for EOOW on any ship with HV installations; some require it of all engineers applying for III/1. Verify with the issuing flag administration.
How long from engine cadet to Chief Engineer?
From the start of a marine engineering programme to the Chief Engineer CoC typically takes 12–18 years: 4 years at college + 12 months cadetship for EOOW, then approximately 12 months at each subsequent rank (Fourth, Third, Second Engineer) before applying for Chief Engineer. Senior ranks require demonstrated experience in machinery management, and many employers expect additional sea time at Second Engineer level before promoting to Chief.

Primary sources

Flag-state caveat: STCW sets the international minimum for marine engineer certification. Individual flag administrations may require additional national examinations, longer sea-time periods at specific ranks, or supplementary courses. Always verify with the issuing flag-state administration.

This page is for information only and does not constitute legal or professional advice. Requirements change — verify with your flag administration before acting.