How Long Are Seafarer Contracts? Rotation, Leave, and Time at Sea Explained

A seafarer's contract — often called a Seafarer Employment Agreement — sets out the terms of your service on board. It specifies your rank, the vessel or fleet, your wage, the length of your tour of duty, and your leave entitlement. It also covers who pays for your travel to and from the vessel, known as joining and signing-off.

The contract length is usually expressed in months on board, sometimes with a tolerance of a month either side to account for crew changes, port schedules, and operational needs. In practice, your actual time on board can be a little shorter or longer than the contract states.

As a general rule, the more senior your rank, the shorter your contract. This reflects the mental and physical demands of command and engineering responsibility, and the industry's effort to retain experienced officers.

Senior officers such as the Master and Chief Engineer often sail rotations of around three to four months. Junior and mid-level officers typically serve four to six months. Ratings — Able Seamen, Oilers, and similar roles — usually serve longer contracts, often six to nine months, and in some trades even longer.

These are general patterns, not rules. A small regional operator may run very different rotations from a large international shipping company, and some trades simply demand longer tours because crew changes are difficult and expensive.

The gap between officer and rating rotations is one of the first things new seafarers notice. It comes down to a mix of responsibility, fatigue management, supply and demand, and cost.

Officers carry legal and operational responsibility for the ship and crew, and the industry recognizes that shorter rotations help maintain safety and retention. Experienced officers are also in shorter supply, so companies offer better rotations to keep them. Ratings are more numerous and their contracts are typically longer, though good companies still aim for fair and humane rotations across all ranks.

Seafarers do not usually get weekends or holidays at sea the way shore workers do — you work every day of your contract. Instead, leave is accrued and taken between contracts, once you sign off and travel home.

Many seafarers describe their pattern as 'on/off' — for example, four months on board followed by two months of leave at home. The exact ratio depends on rank and company. Senior officers often enjoy something close to an equal time on, time off balance, while ratings may have a higher ratio of sea time to leave.

It is worth checking the leave terms carefully before signing. The wage, the rotation, and the leave ratio together determine your real annual earnings and how much of the year you actually spend at home.

Vessel type matters. Deep-sea vessels on long ocean trades tend to have longer contracts because crew changes are harder to arrange. Vessels on short, regular routes near major crew-change hubs can sometimes offer shorter rotations.

The company and its policies matter just as much. Well-run operators plan crew changes carefully and stick to agreed rotations. Others may extend contracts when relief crew or visas are delayed, which is why a clear contract and a reliable company are so valuable.

Finally, real-world disruptions — port congestion, weather, visa issues, or global events — can extend or shorten any contract. Flexibility is part of life at sea, but a fair company communicates clearly and respects the agreed terms wherever possible.