Sign-On Documents Every Seafarer Needs Before a Crew Change (2026 Checklist)

What matters

A crew change lives or dies on paperwork long before anyone reaches the gangway. A clean rotation has two halves: the outgoing crew member handing over what they actually know, and the joining crew member arriving with every document in order, valid, and ready to show. Manning agents, port agents, the flag administration and immigration all check the same core set, and any single gap — an expired certificate, a full seaman's book, a missing transit visa — can stop a sign-on cold. When that happens the vessel either sails a hand short or the relief is delayed at real cost, and the outgoing crew member who has been counting the days is stuck on board. It is almost never dramatic; it is a date nobody watched or a booklet nobody checked. This is the checklist we wish every joining crew member ran two weeks before travel, not the night before the flight.

Timing is the whole game. Most sign-on problems are not missing documents — they are documents that lapse mid-contract or sit too close to expiry to satisfy a port state control officer. A certificate valid on the day you fly but expiring six weeks into a four-month rotation is a problem you have simply postponed, and renewing from a vessel at sea or a foreign port is slow, expensive, and sometimes impossible. Under the Maritime Labour Convention and STCW, the burden of proof sits with the seafarer, not the company, so the safe habit is to treat anything within three to six months of expiry as 'renew now'. Build the buffer before you travel; the joining port is the worst place to discover a gap.

What to capture

Start with the document that trips up crew changes most often: the seaman's book (or Continuous Discharge Book). It has to be valid, not full, and issued by a flag your company and the destination port will recognise. If yours is missing, close to expiry, or out of blank pages, sort it before you book travel — you can apply for a seaman's book online ahead of time, and for some flags a temporary certificate can be issued within 24–48 hours so you can still sign on while the printed book follows over the next few weeks, rather than risk it at the joining port. And check the page count, not just the date: a seaman's book that is valid but full of stamps is still a failed sign-on.

With the book handled, run the rest of the core set. STCW certificates: Basic Safety Training plus every role-specific ticket — advanced firefighting, medical care, tanker or DP endorsements as relevant — all in date. Medical fitness: a valid ENG1 or the flag-recognised equivalent, since an expired medical is the second most common sign-on blocker. Passport: at least six months' validity beyond your expected sign-off, with blank pages, plus any seaman's transit or joining visa the crew-change country requires. Vaccination records where the trade or port demands them. Finally the contract or letter of appointment, and your Certificate of Competency or Recognition where the rank requires one. Photograph every document, front and back, before you leave home — a clear scan resolves most agent and immigration queries in seconds.

How to use the record

Once the set is complete, the job becomes keeping it that way. Put every document in one place — a single folder, physical and digital — and record the expiry date of each one where you will actually see it, not buried in an email. Set a reminder three to six months ahead of each expiry so renewals happen ashore, on your schedule, at normal cost, rather than in a scramble between contracts. Keep clear scans on your phone and in cloud storage so a lost booklet or a demanding immigration desk never ends a rotation. A seafarer who treats their documents like a maintained system, with dates tracked and renewals booked early, almost never has a sign-on refused.

The same discipline applies at the other end of the rotation. A joining crew member arriving document-ready is only half of a clean crew change; the outgoing crew member owes them an honest handover of the vessel's real state — running hours, open defects, quirks, spares, and the things the last person simply knew. That is exactly what PassLog captures: voice, photos and notes turned into a single signed PDF, so knowledge transfers instead of leaving with the person. Get both halves right — documents in order on the way in, knowledge captured on the way out — and the crew change stops being the riskiest day of the contract and becomes a formality. Clear the checklist early, keep it current, and hand over clean.