Candidates routinely blur the distinction between the Safe Manning Document (SMD), crew agreement obligations, and the Official Log Book (OLB), treating them as loosely related paperwork rather than legally interlocking instruments. The examiner will probe each separately and expects command-level ownership of all three.
Safe Manning Document
The SMD is issued by the flag State and specifies the minimum number and grades of certificated personnel required to operate the vessel safely at sea. As Master, you are legally responsible for ensuring the vessel is not operated below those minimums. The document must be posted on board in a visible location. A vessel that sails undermanned against the SMD is unseaworthy — that is your personal liability, not the company's problem to absorb. If operational circumstances threaten compliance (crew illness, injury, repatriation), you must notify the owner/operator and the flag State as appropriate, and you must not sail if the document's requirements cannot be met.
Crew Agreements
Every seafarer employed on a UK-flagged vessel requires a crew agreement in a form approved by the MCA. The crew agreement is the legal contract of employment between the seafarer and the employer; it specifies the voyage or period, wages, and employment conditions. The Master signs crew agreements on behalf of the employer and is responsible for ensuring they are properly completed, that each seafarer has signed on before departure, and that sign-offs are properly recorded. Failure to maintain a valid crew agreement is a statutory offence. For commercial yachts, Part 4A agreements or voyage agreements may apply depending on trading pattern — know which format applies to your vessel and be able to explain why.
Employment Conditions and the MLC 2006
Employment conditions aboard a commercial yacht operating internationally are governed by the Maritime Labour Convention 2006, implemented in UK law. Minimum wage, leave entitlement, repatriation rights, health protection, and access to welfare facilities all derive from MLC. As Master, you must know where the MLC certificate (or Declaration of Maritime Labour Compliance, DMLC Parts I and II) is kept, and you act as the first point of contact for any seafarer complaint under the MLC grievance procedure.
Official Log Book
The OLB is a statutory record required under the Merchant Shipping Act. It is not a narrative diary — it is a legal document in which prescribed events must be recorded. These include: births and deaths on board; illness and injury; disciplinary proceedings; record of drills and safety equipment inspections; steering gear tests; hours of rest records (some flag administrations embed these here); survey-related entries; and the Master's signature on various statutory matters. Entries must be made at the time of the event or as soon as practicable, signed by the Master and, where required, a witness. Erasures are not permitted — errors are crossed through legibly and initialled. The OLB is submitted to the Registrar of Shipping on voyage completion or vessel disposal. Losing or failing to maintain the OLB is a criminal offence. Candidates who say 'I'd just write it in the deck log' have failed.