Marine Tales — The World of Merchant Navy, Explained
THE WORLD OF MERCHANT NAVY, EXPLAINED

The world moves by sea.

Stories, knowledge and perspectives from the world of Merchant Navy and commercial shipping — written by the people who work on board.

EXPLORE THE MARITIME WORLD
LAT 37°09'N · LON 095°71'W MARINE SCROLL ↓
FEATURED STORY
RECENT

Strait of Hormuz: Why the Whole Shipping World Is Watching?

A narrow waterway carrying a huge share of the world’s energy supplies. Any disruption here could ripple through shipping, oil markets, global trade, and seafarers’ lives. Here’s why this strategic chokepoint matters to the entire maritime industry.

CHIEF ENGINEER T AUGUSTEN·03 SEP 2026·14 MIN READ
READ STORY
DISPATCHES

What's happening at sea

ALL NEWS
SECURITY

How Pirates Actually Capture a 50,000-Ton Ship

A 50,000-ton merchant ship may look almost impossible to overpower. Yet piracy has shown that size alone does not guarantee safety at sea.

03 SEP 2026·7 MIN
SHIPPING

Why Are Ships Going Around Africa Instead of Through the Suez Canal?

The longer route around the Cape of Good Hope is becoming a strategic choice as security risks reshape global shipping.

03 SEP 2026·8 MIN
TECHNOLOGY

Could a Nuclear-Powered Container Ship Become Reality?

New reactor technology and pressure to decarbonise shipping are bringing the idea back into serious discussion.

03 SEP 2026·10 MIN
SAFETY

What Happens When a Giant Container Ship Loses Its Engine?

When a ship carrying thousands of containers suddenly loses propulsion, the ocean becomes a very different place.

03 SEP 2026·8 MIN
TECHNOLOGY

Could Fully Autonomous Cargo Ships Replace Crews?

Removing the crew raises a bigger question: can technology really replace human judgment at sea?

03 SEP 2026·9 MIN
LIFE AT SEA

What Is It Really Like to Spend 6 Months at Sea?

Routine, responsibility, isolation, friendship, and learning to live with the ocean.

03 SEP 2026·9 MIN
THE FUNDAMENTALS

Merchant Navy, explained.

Every merchant ship runs on the same small set of departments, ranks and rules. Start here and the rest of the industry becomes readable.

ON THE BRIDGE

Deck Department

The deck department navigates the ship and looks after everything the ship carries. That means passage planning, bridge watchkeeping, collision avoidance, cargo loading and discharge, stability and draught calculations, mooring operations, and the maintenance of hull, holds and life-saving equipment. Legally, the department also holds responsibility for the safety of everyone on board.

RANK STRUCTURE — DECK
  1. Master Overall command. Legal authority over ship, cargo and crew; keeps no navigational watch.
  2. Chief Officer Second in command. Runs cargo operations, stability and the deck maintenance plan; keeps the 04–08 watch.
  3. Second Officer Navigator. Passage planning, chart and ECDIS upkeep, medical duties; keeps the 12–04 watch.
  4. Third Officer Safety equipment and LSA/FFA inspections; keeps the 08–12 watch.
  5. Deck Cadet Trainee officer building sea time against a training record book.
EXPLORE THE DECK SIDE
IN THE ENGINE ROOM

Engine Department

The engine department keeps the ship moving and alive. Propulsion, electrical generation, fuel and lubricating oil systems, boilers, pumps, purifiers, steering gear, refrigeration, fresh water and sewage all sit here. Most modern ships run unmanned machinery spaces at night, with a duty engineer on call for the alarm panel.

RANK STRUCTURE — ENGINE
  1. Chief Engineer Head of department. Answers for the whole machinery plant, bunkers, spares and the maintenance budget.
  2. Second Engineer Runs the engine room day to day — work planning, main engine and the watch rota.
  3. Third Engineer Usually the boilers, generators and fuel system.
  4. Fourth Engineer Usually purifiers, pumps, compressors and the bilge/ballast systems.
  5. Engine Cadet Trainee engineer accumulating workshop skills and sea time.
EXPLORE THE ENGINE SIDE
CONTROL AND AUTOMATION

Electro-Technical Department

As ships became more automated, the electrical side grew into a department of its own. The ETO looks after main and emergency switchboards, generators and load sharing, motor starters, the alarm and monitoring system, cargo control instrumentation, and the bridge electronics — radar, ECDIS, gyro, GMDSS and increasingly the ship’s IT and cyber security.

RANK STRUCTURE — ETO
  1. Electro-Technical Officer Certificated officer under STCW. Switchboards, automation, PLCs, bridge and cargo electronics.
  2. Electrician Ships without an ETO often carry an electrician instead, working under the Second Engineer.
  3. Electro-Technical Rating Support rating for electrical maintenance on larger or specialised vessels.
EXPLORE THE ETO ROLE
THE WORKING CREW

Ratings

Ratings do the physical work of running a ship. On deck that means lookout duty on the bridge watch, mooring and unmooring, rigging gangways, chipping and painting, hold cleaning and lashing checks. Below it means assisting the engineers with maintenance, purifiers and machinery cleaning. The catering staff feed everyone, which on a long voyage matters more than any other single thing.

RANK STRUCTURE — RATINGS
  1. Bosun Senior deck rating. Takes the Chief Officer’s work list and runs the deck gang.
  2. Able Seaman (AB) Certificated deck rating. Lookout, helmsman, mooring party, general maintenance.
  3. Ordinary Seaman (OS) Entry-level deck rating working toward AB certification.
  4. Fitter / Motorman Engine room ratings — welding, machining, and machinery assistance.
  5. Oiler / Wiper Engine room support: lubrication rounds, cleaning, storing spares.
  6. Cook & Steward Catering department. Provisions, meals and accommodation upkeep.
EXPLORE THE RATINGS
THE FIRST CONTRACT

Cadets

A cadet is an officer in training, sponsored by a company or a maritime academy, sailing to complete the sea service that a first certificate of competency requires. The job is part apprenticeship and part examination: you work alongside the department, and you document it. Typically 12–18 months of sea time, then college, written exams and an oral examination before sailing as a junior officer.

HOW CADETSHIP WORKS
  1. Deck Cadet Watchkeeping under supervision, cargo work, bridge equipment, seamanship tasks.
  2. Engine Cadet Watchkeeping in the machinery space, workshop practice, maintenance rounds.
  3. Training Record Book The signed-off evidence of every required task — the document your certificate depends on.
  4. Sea time Recorded on discharge certificates and verified by the flag administration.
  5. Certificate of Competency Awarded after exams and orals, allowing you to sail as a certificated officer.
EXPLORE CADET LIFE
ASHORE

Ship Management

A ship rarely belongs to the company whose name is on the funnel. Ownership, commercial employment and technical management are often three separate businesses. Knowing which one is asking is how a Master works out whether an instruction is a request or an order.

WHO GIVES THE ORDERS
  1. Owner Owns the asset. May do nothing else but finance and register the vessel.
  2. Technical Manager Runs the ship under the ISM Code — maintenance, certification, drydocking, budgets.
  3. Crew Manager Recruits, certifies and rotates the crew; handles contracts and travel.
  4. Charterer Employs the ship commercially and decides where and what it carries.
  5. Superintendent Shore engineer or marine superintendent attending ships and audits.
  6. DPA Designated Person Ashore — the crew’s direct line to the company on safety matters.
  7. Agent The company’s representative in each port, arranging everything alongside.
EXPLORE THE SHORE SIDE
THE RULE BOOK

Maritime Regulations

Life on board is governed by a small stack of international conventions, enforced by three separate authorities: the flag state the ship is registered with, the port state it calls at, and the classification society that certifies its structure and machinery. Nearly every drill, checklist and logbook entry traces back to one of the documents below.

THE SIX THAT SHAPE THE JOB
  1. SOLAS Safety of Life at Sea. Construction, life-saving appliances, fire protection, drills.
  2. MARPOL Pollution prevention — oil, chemicals, sewage, garbage and air emissions.
  3. STCW Training, certification and watchkeeping standards for every seafarer.
  4. ISM Code The safety management system a company must run, and the ship must follow.
  5. ISPS Code Ship and port security levels, access control and the ship security plan.
  6. MLC 2006 Seafarers’ employment rights — hours of rest, accommodation, food, repatriation.
EXPLORE THE GLOSSARY

RANK TITLES AND DEPARTMENT STRUCTURES VARY BY FLAG STATE, COMPANY AND VESSEL TYPE. THE STRUCTURES SHOWN ARE THE COMMON MERCHANT PATTERN AND SHOULD BE CHECKED AGAINST THE APPLICABLE SAFE MANNING DOCUMENT BEFORE PUBLICATION.

80–90%
of global trade by volume is estimated to travel by sea.
50,000+
merchant ships are in service across the global fleet.
Millions
of seafarers keep those ships running, year round.

FIGURES SHOWN AS INDICATIVE RANGES. EACH IS TO BE SOURCED AND DATED BEFORE PUBLICATION.

THE FLEET

Ships

Machines built to move the world.

ALL SHIP TYPES
UP TO 24,000 TEU
Container Ships
VLCC · SUEZMAX · AFRAMAX
Tankers
CAPESIZE · PANAMAX
Bulk Carriers
CARGO AT −162 °C
LNG Carriers
TECHNICAL LIBRARY

How ships work

Complex ship systems explained simply — one machine at a time, with the diagrams and the operating logic that engineers actually use.

01 Main Engine Two-stroke, slow-speed, directly coupled — why the biggest diesel on earth turns at 80 rpm. 02 Electrical Systems Generators, switchboards, load sharing — and what happens in the seconds after a blackout. 03 Steering Gear Hydraulic power moving a 90-tonne rudder, and the tests done before every departure. 04 Ballast Systems Why a ship carries water it doesn't want, and how treatment plants changed the job. 05 Navigation Systems ECDIS, radar, gyro and GNSS — the instruments a bridge watch is built around.
ALL 15 SYSTEMS
CAREERS

Your journey to sea

From the first application to the day you sign on as Master or Chief Engineer. Six stages, roughly a decade, and a lot of sea time.

STAGE 01

Cadet

Pre-sea training, sponsorship, and 12–18 months of sea time in a training record book.

STAGE 02

Junior Officer

Third Officer or Fourth Engineer. First certificate, first watch of your own.

STAGE 03

Officer

Second Officer or Third Engineer. Passage planning, maintenance, real responsibility.

STAGE 04

Senior Officer

Management-level certificate. Cargo, safety and the crew start reporting to you.

STAGE 05

Chief Officer / 2nd Eng.

Running the deck or the engine room day to day, one rank below command.

STAGE 06

Master / Chief Engineer

Command. Legal authority over the ship, the cargo and everyone on board.

How to join the Merchant Navy Required courses & certificates Medical requirements Salary & benefits Life after sailing
REFERENCE

Maritime glossary

Every abbreviation in the industry, in plain language first and technical detail second. Searchable from anywhere on the site.

AIS
Automatic Identification System

A transponder system through which ships and shore stations automatically exchange identity, position, course and speed.

SOLAS
International Convention for the Safety of Life at Sea

The IMO convention setting minimum safety standards for the construction, equipment and operation of merchant ships.

DWT
Deadweight Tonnage, in tonnes

The total mass a ship can carry when loaded to her marks: cargo, bunkers, stores, fresh water and crew.

TEU
Twenty-foot Equivalent Unit

The unit container capacity is counted in. One 20-foot box is 1 TEU; a 40-foot box counts as 2.

ECDIS
Electronic Chart Display and Information System

An approved navigation system that displays electronic charts with the ship’s position, and may replace paper charts.

STCW
Standards of Training, Certification and Watchkeeping

The IMO convention setting the minimum training, certification and watchkeeping standards for seafarers.

Stay connected to the sea.

The latest maritime stories, ship knowledge, industry updates and interesting things from the world of Merchant Navy — once a fortnight, nothing else.

{{ subscribeMessage }}