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Engine Department Ranks

Top 7 engine department ranks explained. Learn duties, salaries, CoC requirements, and career paths from Wiper to Chief Engineer on merchant ships.

•By MerchantNavy.co Editorial Team•8 min read•0 words
engine department ranks

Engine Department Ranks

Engine department ranks govern the operation, maintenance, and safety of all machinery aboard commercial vessels. From the main propulsion diesel engine to auxiliary boilers and electrical generators, the engine room team keeps the ship moving through every ocean passage. The global fleet of 105,000 merchant vessels relies on licensed marine engineers certified under the STCW Convention [ICS, 2023].

This guide lists all seven primary engine department ranks found on container ships, bulk carriers, oil tankers, and LNG carriers. Each entry covers duties, salary ranges, certificate requirements, and the next step in the engineering career ladder.

What Is the Engine Department on a Merchant Ship?

The engine department is responsible for propulsion, power generation, fuel management, and mechanical maintenance of all shipboard systems. The Chief Engineer holds authority over the engine room. Junior engineers stand machinery watches. Ratings assist with maintenance and cleaning under engineer supervision [STCW Code, 2010].

The International Maritime Organization (IMO) classifies marine engineering officers under STCW Chapter III. Flag state administrations including the UK Maritime and Coastguard Agency (MCA), Indian Directorate General of Shipping (DGS), and Liberian Registry issue Certificates of Competency (CoC) for each engineering rank.

1. Wiper

Wiper is the entry-level engine room rating responsible for cleaning, assisting with maintenance, and learning basic machinery operations. Wipers have no engineering license and work under the supervision of Motormen and Engineers.

  • Experience Required: 0–1 year at sea
  • Typical Salary: $700–$1,200 per month
  • Certificate: STCW Basic Safety Training (BST), seafarer medical fitness certificate
  • Key Duties: Engine room cleaning, oil wiping, tool preparation, assisting with spare parts handling
  • Career Path: Progress to Oiler after 6–12 months of assessed sea service

Wipers gain exposure to main engine operations, purifier systems, and auxiliary machinery on vessels operated by companies such as Hapag-Lloyd, COSCO Shipping, and Oldendorff Carriers. The rank serves as the starting point for both rating advancement and eventual officer training.

2. Oiler (Motorman)

Oiler is a skilled engine room rating qualified to lubricate machinery, monitor operating parameters, and assist engineers during watchkeeping. Oilers hold an STCW Able Seafarer Engine qualification.

  • Experience Required: 1–3 years in the engine room
  • Typical Salary: $1,000–$2,000 per month
  • Certificate: STCW Able Seafarer Engine certificate, BST, medical certificate
  • Key Duties: Machinery lubrication, filter changes, bilge monitoring, watch assistance
  • Career Path: Remain as senior rating or apply to marine engineering college as an Engine Cadet

Oilers are critical during long ocean passages on vessels transiting the Indian Ocean and North Atlantic. They monitor bearing temperatures, assist with fuel oil treatment, and perform routine maintenance on pumps and compressors. Experienced Oilers frequently transition into engineering officer programs through company sponsorship.

3. Engine Cadet

Engine Cadet is the trainee engineering officer rank for students completing mandatory sea service before their first engineering CoC examination. Cadets learn machinery operation, maintenance planning, and engine room safety under licensed engineer supervision.

  • Experience Required: 0–2 years (during cadetship training period)
  • Typical Salary: $300–$800 per month (training allowance)
  • Certificate: Enrolled in STCW-approved marine engineering program, BST completed
  • Key Duties: Engine room watchkeeping under supervision, logbook entries, machinery inspection, spare parts inventory
  • Career Path: Qualify as Fourth Engineer after passing EOOW (Engine Officer of the Watch) CoC exam

Engine Cadets train on vessels flagged to Marshall Islands, Malta, and Hong Kong registries. Programs at institutions like Tolani Maritime Institute, Glasgow College, and Australian Maritime College require 12 months of combined engine room sea time before EOOW eligibility [IMO Model Course 7.04, 2014].

4. Fourth Engineer

Fourth Engineer is the first licensed engineering officer rank, responsible for auxiliary machinery, boiler operations, and engine room watchkeeping. Fourth Engineers hold an STCW III/1 EOOW Certificate of Competency.

  • Experience Required: 2–5 years total including cadetship
  • Typical Salary: $2,500–$4,500 per month
  • Certificate: STCW III/1 EOOW CoC, advanced firefighting certificate
  • Key Duties: Auxiliary engine monitoring, boiler water treatment, fuel oil purifier operation, sewage plant maintenance
  • Career Path: Accumulate 12 months EOOW sea service, then sit for Third Engineer CoC

Fourth Engineers manage freshwater generators, air compressors, and refrigeration plants per manufacturer specifications from Wärtsilä, MAN Energy Solutions, and Alfa Laval. They conduct daily machinery rounds and report abnormalities to the Second Engineer during each watch period.

5. Third Engineer

Third Engineer is the mid-level engineering officer responsible for fuel systems, main engine auxiliary systems, and engine room safety equipment. This rank holds an STCW III/2 Third Engineer CoC.

  • Experience Required: 5–8 years total sea service
  • Typical Salary: $3,500–$6,000 per month
  • Certificate: STCW III/2 Third Engineer CoC, engine room resource management training
  • Key Duties: Fuel oil system management, main engine parameter monitoring, planned maintenance system updates
  • Career Path: Complete 12 months as Third Engineer, then qualify for Second Engineer CoC

Third Engineers oversee fuel switching operations when entering Emission Control Areas (ECAs) under MARPOL Annex VI. They coordinate with the deck department during cargo heating operations on product tankers and manage the vessel's lube oil inventory and analysis program.

6. Second Engineer (First Assistant Engineer)

Second Engineer is the deputy head of the engine department and the operational manager of all machinery maintenance and engine room personnel. Second Engineers hold an STCW III/2 Second Engineer CoC.

  • Experience Required: 8–12 years total sea service
  • Typical Salary: $5,500–$9,500 per month
  • Certificate: STCW III/2 Second Engineer CoC, high-voltage safety training
  • Key Duties: Planned maintenance scheduling, spare parts procurement, engine room crew management, dry dock preparation
  • Career Path: Complete 12 months as Second Engineer, then pass Chief Engineer CoC examination

Second Engineers manage the Planned Maintenance System (PMS) and coordinate with shore technical superintendents from companies like Bernhard Schulte Shipmanagement and Thome Group. They supervise major overhauls of main engines, turbochargers, and stern tube seals during port stays at Singapore, Fujairah, and Rotterdam.

7. Chief Engineer

Chief Engineer is the highest engine department rank and holds full authority over all machinery, fuel, and engineering personnel aboard the vessel. The Chief Engineer holds an STCW III/2 Chief Engineer CoC.

  • Experience Required: 12–15+ years total sea service
  • Typical Salary: $8,000–$16,000 per month (varies by vessel type and company)
  • Certificate: STCW III/2 Chief Engineer CoC, ISM Code designated person responsibilities
  • Key Duties: Overall machinery management, fuel budget control, regulatory compliance, engine room safety leadership
  • Career Path: Shore-based roles as Technical Superintendent, Fleet Manager, or Marine Surveyor

The Chief Engineer reports directly to the Master and represents the engineering department before Port State Control inspectors. On LNG carriers operated by companies like Shell and BP Shipping, Chief Engineers manage dual-fuel propulsion systems and cargo reliquefaction plants worth tens of millions of dollars. Chief Engineers on large container vessels oversee MAN B&W two-stroke main engines producing over 80,000 horsepower [MAN Energy Solutions, 2022].

How Do You Choose the Right Engine Rank to Target?

Your target engine department rank depends on your academic background, aptitude for mechanical systems, and preferred vessel type. Candidates with a mechanical engineering degree can enter an Engine Cadet program directly. Engine room ratings can pursue officer certification through rating-to-officer pathways in select flag states.

Key factors to evaluate:

  • Academic route: Marine engineering degree vs. electro-technical officer (ETO) pathway
  • Vessel specialization: LNG carriers and cruise ships demand advanced engineering qualifications
  • CoC flag state: MCA, DGS, and USCG licenses differ in examination format and global recognition
  • Company sponsorship: Fleet Management, Anglo-Eastern, and Mitsui O.S.K. Lines sponsor engine cadet programs
  • Shore leave pattern: Deep-sea tankers offer longer contracts; offshore vessels offer shorter rotations

Frequently Asked Questions

How long does it take to become Chief Engineer from Engine Cadet?

The standard progression from Engine Cadet to Chief Engineer takes 12 to 15 years. Each rank promotion requires 12 months of sea service plus passing a CoC examination. Candidates on specialist vessels like LNG carriers may need additional type-specific endorsements that add 1–2 years to the timeline.

What is the difference between Second Engineer and Chief Engineer?

The Second Engineer manages daily maintenance schedules and supervises engine room crew. The Chief Engineer holds ultimate engineering authority, controls the fuel budget, and answers to the Master and shipowner for all machinery-related compliance. The Chief Engineer signs engineering logbooks and statutory maintenance records.

Is marine engineering harder than deck officer training?

Marine engineering training requires strong mechanical and thermodynamic knowledge. Deck officer training focuses on navigation law and bridge procedures. Both pathways demand equal sea service hours and rigorous CoC examinations. Engineering officers typically earn 10–15% higher salaries than deck officers at equivalent ranks due to machinery specialization demand.

Which engine rank is in highest demand globally?

Fourth Engineer and Third Engineer ranks face the strongest global demand. The BIMCO/ICS Seafarer Workforce Report identifies a shortage of certified engineering officers, particularly for LNG, chemical tanker, and offshore vessel sectors [BIMCO, 2023].

References & Citations

  • [ICS, 2023] International Chamber of Shipping. "Seafarer Workforce Report."
  • [STCW Code, 2010] International Maritime Organization. "Standards of Training, Certification and Watchkeeping."
  • [IMO Model Course 7.04, 2014] International Maritime Organization. "Officer in Charge of an Engineering Watch."
  • [MARPOL Annex VI, 2021] International Maritime Organization. "Prevention of Air Pollution from Ships."
  • [BIMCO, 2023] BIMCO and International Chamber of Shipping. "Seafarer Workforce Report."
  • [MAN Energy Solutions, 2022] MAN Energy Solutions. "Two-Stroke Marine Engine Portfolio."
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