Merchant Navy Rating Jobs: Duties and Career Path

Merchant navy rating jobs are entry-level and skilled seagoing roles that support the daily operation of a ship. Ratings work under officers in deck, engine and catering departments. Their work keeps the vessel clean, maintained, supplied and ready for cargo operations, watchkeeping, emergency response and inspections.

This guide explains what merchant navy ratings do, which departments they work in, what skills matter onboard and how a rating can build a career at sea.

What is a merchant navy rating?

A rating is a trained crew member who is not serving as a licensed officer. Ratings may work as ordinary seamen, able seamen, motormen, oilers, fitters, wipers, cooks, stewards or general purpose crew depending on the vessel and company. The exact title changes by country, flag and manning system.

Ratings are essential because they carry out the hands-on work that officers supervise. A well-trained rating understands safe working practices, shipboard discipline, emergency duties, basic maintenance and the importance of following the vessel's safety management system.

Deck rating duties

Deck ratings assist with navigation watch support, mooring, anchoring, cargo operations, cleaning, painting and maintenance of deck equipment. They may handle ropes, operate winches under supervision, prepare gangways, assist with hatch covers, check cargo hold cleanliness and maintain lifesaving appliances.

On many vessels, experienced deck ratings also help with lookout duties and bridge watch routines. They must understand commands, hand signals, personal protective equipment and the hazards of working around mooring lines, cranes, cargo gear and open decks in bad weather.

Engine room rating duties

Engine ratings work with marine engineers to keep machinery spaces clean, safe and operational. Typical duties include checking bilge areas, assisting with pumps and compressors, cleaning filters, supporting purifier maintenance, helping during bunkering and carrying out routine inspections.

Engine room work requires awareness of heat, rotating machinery, fuel injection equipment, high-pressure lines, noise and confined spaces. A rating does not replace an engineer, but a careful engine rating can help identify leaks, unusual vibration, temperature changes and unsafe conditions before they become serious defects.

Catering and steward department roles

Catering ratings support crew welfare. Cooks, messmen and stewards help with food preparation, hygiene, stores, accommodation cleaning and galley routines. Their work affects morale, health and daily life onboard, especially on long voyages where shore access is limited.

Good catering staff must understand food safety, waste segregation, inventory control and the cultural needs of multinational crews. A clean galley and well-managed stores can prevent illness and reduce avoidable conflict onboard.

Training, certificates and safety expectations

Training requirements depend on the country, flag and company, but ratings normally need approved basic safety training before joining a vessel. Many roles also require medical fitness, identity documents, seafarer records, security awareness and department-specific training. STCW-related training is commonly part of the pathway for international service.

Companies look for discipline, English communication, practical ability, teamwork and willingness to learn. Ratings should also understand why permits to work, lockout procedures, enclosed-space entry checks and emergency drills are taken seriously.

Documents and joining preparation

Before applying for merchant navy rating jobs, candidates should prepare a simple document checklist. This normally includes passport, seafarer identity documents where applicable, medical fitness, basic safety certificates, watchkeeping or rating certificates if required, vaccination records, police clearance where requested and previous sea-service records.

Joining can fail at the last moment if names, certificate numbers or expiry dates do not match. Keep scanned copies organised, but also carry originals when the company, manning agent or port authority requires them. Ratings should confirm the joining port, vessel name, contract terms, wage structure, repatriation arrangement and emergency contact before travel.

Career growth for ratings

A rating can grow into senior rating positions and, with further education and sea-time, may progress toward officer-level training where the national system allows it. The best path is to keep documents current, record sea service properly, learn from officers and build a reputation for safe, reliable work.

Common mistakes

• Joining without understanding the department. Deck, engine and catering work require different skills and expectations.
• Ignoring document validity. Expired medicals, certificates or seafarer records can stop a joining at the last moment.
• Underestimating safety culture. Shortcuts around mooring, machinery, chemicals or enclosed spaces can be life-threatening.
• Changing companies too often without building sea-time, references and practical competence.

Next steps

If you are planning a career as a rating, compare the duties above with current openings in the merchant navy jobs portal. You can also browse the merchant navy careers knowledge base for training and joining guidance.