MLC 2006 Medical Care Requirements, Explained for Operators

What does MLC 2006 require for medical care?

The Maritime Labour Convention, 2006 sets an international floor for seafarers' working and living conditions. For medical care, Regulation 4.1 and Standard A4.1 require a flag State to provide health protection and medical care, including essential dental care, for seafarers working on ships flying its flag. Care should be as comparable as possible to that generally available to workers ashore, with prompt access to necessary medicines, medical equipment, diagnostic and treatment facilities, and medical information and expertise. Where practicable, seafarers must be able to visit a qualified doctor or dentist without delay in ports of call.

That high-level right becomes a set of operational controls: a medicine chest, medical equipment and a medical guide; regular inspection of those provisions; appropriately trained people where no doctor is carried; access to medical advice by radio or satellite around the clock; and, for a defined category of ship, a qualified medical doctor on board. Standard A4.2 separately addresses shipowners' liability for sickness and injury, including treatment costs and financial security. Regulation 4.3 covers occupational safety and health. An operator should map all three rather than treating the medicine chest as the whole of MLC medical compliance.

The Convention is implemented through national law. Its mandatory floor sits in the Articles, Regulations and Part A of the Code; Part B provides non-mandatory guidance that ratifying States must give due consideration when implementing their responsibilities. The exact inventory, training certificates, inspection process, cost rules and enforcement pathway therefore depend on the ship's flag and the legislation that gives the MLC effect there. This article explains the international baseline and uses current UK guidance as an implementation example, not as a universal rule for every flag.

Which ships and people are covered?

The MLC definition of a seafarer is broad: any person employed, engaged or working in any capacity on board a ship to which the Convention applies. The ship need not be on an international voyage; the Convention can apply to domestic commercial voyages too. It does not apply to ships navigating exclusively in inland waters or waters within, or closely adjacent to, sheltered waters or areas where port regulations apply. It also excludes fishing vessels, ships of traditional build, warships and naval auxiliaries, while a State may address uncertainty over whether a particular vessel or category is a ship after consultation with shipowner and seafarer organisations.

For offshore wind, neither 'offshore worker' nor 'wind technician' answers the scope question. A technician who works aboard an SOV may fall within the national seafarer definition even if their trade is turbine maintenance; a person temporarily transported as industrial personnel may be treated differently under the applicable national framework. A fixed turbine or offshore substation is not automatically a ship, and MLC rights do not transfer to an installation merely because it is offshore. The competent authority's classification, the flag, the person's real working pattern and the applicable coastal-state and health-and-safety regimes must be checked.

Operators should record the conclusion per role and asset rather than rely on contract labels. Ask: is the unit a ship for the relevant law, does the MLC apply to it, which State is responsible for flag implementation, and is the person employed, engaged or working on board in a way that makes them a seafarer? If there is genuine doubt, obtain a determination or advice from the competent authority. A commercial agreement cannot by itself remove statutory status or obligations.

What must be carried and who must be trained?

Standard A4.1 requires every covered ship to carry a medicine chest, medical equipment and a medical guide. National laws must prescribe the content, proper maintenance and inspection, taking account of ship type, persons on board, voyage nature, destination and duration, the work performed, cargo and relevant recommendations. The required regular inspection must occur at intervals not exceeding 12 months and cover labelling, expiry dates, storage conditions and the functioning of equipment. The competent authority or its authorised body conducts that inspection under the Convention; flag-state implementation determines the practical process.

Where a ship does not carry a doctor, at least one seafarer must be in charge of medical care and administering medicine as part of their regular duties, or at least one seafarer must be competent to provide medical first aid. The required training must meet the International Convention on Standards of Training, Certification and Watchkeeping. Part B guidance distinguishes ships normally able to reach qualified care within eight hours, for which approved medical-first-aid training is contemplated, from other ships, for which a designated seafarer with approved medical-care training is contemplated. This eight-hour distinction is guidance for national implementation, not a standalone operator exemption from the mandatory requirements.

Competence and inventory must fit one another. A compliant box is not useful if no one can identify, retrieve and safely use its contents; a trained officer cannot execute advice that assumes medicines or monitoring equipment the ship does not carry. Operators should align the flag-approved inventory, medical guide, responsible person's training, familiarisation, language needs and telemedical pathway, then cover absence, fatigue and competing emergency duties in the manning plan.

When is a ship's doctor required?

The MLC threshold is narrower than many summaries suggest. Ships carrying 100 or more persons and ordinarily engaged on international voyages of more than three days must carry a qualified medical doctor responsible for medical care. The threshold counts persons, not only seafarers. National laws must also identify any other ships required to carry a doctor, considering factors including voyage duration, nature and conditions and the number of seafarers aboard.

Do not reverse that rule into 'fewer than 100 means no professional medical support is needed'. Below the international threshold, the ship still needs the required stores, guide, trained seafarer and telemedical access, and flag law may impose a doctor requirement on additional ships. Separately, an operation-specific risk and first-aid needs assessment may support an on-board medic or another professional layer because of headcount, work hazards, expected evacuation delay or project phase. A medic is not automatically a substitute for a doctor where law requires a qualified medical doctor, and a remote doctor is not physically carried on board.

UK guidance illustrates how implementation can differ in wording while giving effect to the standard: current MCA MGN 482 Amendment 2 requires a medical practitioner on a ship carrying 100 or more persons on an international voyage of 72 hours or longer and points to separate UK qualifying criteria for ship's doctors. Operators of non-UK ships should use their own flag legislation and competent-authority guidance rather than copy that formulation into a fleet standard without checking applicability.

What does MLC 2006 require for telemedical advice?

Standard A4.1 requires each ratifying State to ensure, through a prearranged system, that medical advice by radio or satellite communication to ships at sea—including specialist advice—is available 24 hours a day. The advice, including transmission of medical messages between ship and shore, must be available free of charge to all ships irrespective of flag. IMO circular MSC/Circ.960 describes the wider medical-assistance-at-sea architecture and the role of a Telemedical Assistance Service, or TMAS.

This public entitlement is a clinical safety layer, but MLC does not by itself promise a private-provider SLA, a specific physician connection time, video availability, knowledge of a particular operator's inventory, integration with an emergency response plan, management reporting or dedicated follow-up. Operators should know the flag-state and coastal-state pathways, keep contact instructions immediately available, test communications and ensure responders can provide the information the advising clinician needs. A private service can add contractual and site-specific capability, but it should complement—not obscure—the statutory TMAS and rescue-coordination routes.

Telemedical advice is a remote assessment based on the information and examination possible aboard. It cannot perform imaging, laboratory testing, a complete hands-on examination, rescue or evacuation. The on-board responder remains limited by training, scope, equipment and circumstances, while operational authority remains with the master under the applicable command and legal framework. Time-critical contact with rescue coordination should not be delayed while waiting for a remote consultation.

The operator's MLC medical-care checklist

A useful compliance file connects legal applicability to evidence aboard the ship. It should not stop at a certificate. The following sequence is deliberately conservative: confirm the status and flag first, identify the current national implementation, and then test whether the working system matches the documented one. Legal and competent-authority advice may be required for borderline offshore units and personnel categories.

What MLC compliance does not prove

MLC compliance establishes an important minimum; it does not certify that every offshore medical scenario is adequately controlled. The Convention is centred on seafarers and ships. It does not automatically settle provision for technicians working on fixed offshore structures, nor does it replace coastal-state health-and-safety duties, an employer's first-aid needs assessment, the project's emergency response plan or rescue-authority coordination.

It also does not prove that a medicine chest is suited to every specialist work activity, that responders can reach a casualty at height, that a treatment room is clinically staffed, that connectivity supports video, or that an evacuation asset will be immediately available. Those are operational claims that need their own risk assessment, equipment decision, training, contract, interface testing and exercise evidence.

The strongest model treats the MLC as the vessel baseline and builds outward: classify the people and assets correctly, comply with flag requirements, map other applicable duties, align first response with professional clinical support, and test the entire route from casualty to definitive care. That avoids both under-compliance and the opposite error—presenting a statutory minimum as a guarantee of medical outcome or operational resilience.

Sources

• International Labour Organization: MLC, 2006, as amended — Regulation 4.1 and Standard A4.1, Medical care on board ship and ashore
• International Labour Organization: MLC, 2006 — definitions, scope and flag-State responsibility
• International Labour Organization: Frequently Asked Questions about the MLC, 2006, 6th edition (2026)
• International Maritime Organization: MSC/Circ.960, Medical Assistance at Sea — TMAS architecture and division of responsibility
• UK Maritime and Coastguard Agency: MGN 482 (M) Amendment 2, MLC 2006 medical care (published March 2026)
• UK Maritime and Coastguard Agency: MLC 2006 Titles 1–5 — regulations, guidance and information