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Home / Insights / What Is a Seafarer? The MLC Definition — and Why Wind Technicians Fall Through It

Regulatory explainer2026-07-19 · 6 min read

What Is a Seafarer? The MLC Definition — and Why Wind Technicians Fall Through It

MLC 2006 defines a seafarer as anyone working on board a ship — yet offshore wind technicians usually don't qualify. What that means for their medical care.

Bow of a crew transfer vessel pushed against the yellow boat landing ladder of an offshore wind turbine in rough grey sea

What is a seafarer?

A seafarer, under the Maritime Labour Convention 2006 (MLC), is "any person who is employed or engaged or works in any capacity on board a ship to which this Convention applies" — Article II(1)(f). The definition is deliberately broad: it covers not just deck and engine crew but cooks, stewards, and anyone else whose work happens on board, on ships ordinarily engaged in commercial activities.

The label matters because a long list of rights hangs on it. Seafarers are entitled in principle to medical care on board and ashore at no cost to themselves (Regulation 4.1), subject to the Convention's implementing rules and limited exceptions. They have a right to repatriation when the circumstances in Regulation 2.5 are met — including when illness or injury requires repatriation and they are medically fit to travel — and must hold an accepted statutory medical fitness certificate under Regulation 1.2. Separately, Standard A4.1 requires free 24/7 medical advice by radio or satellite to be available to all ships at sea irrespective of flag; that service is framed as provision to the ship, not as an individual entitlement restricted to seafarers. Roughly 1.89 million seafarers served the world's merchant fleet at the time of the 2021 BIMCO/ICS Seafarer Workforce Report.

Offshore wind is building a large workforce right beside that fleet: GWEC and the Global Wind Organisation forecast a need for more than 530,000 trained wind technicians globally by 2028. Many of them travel to work by crew transfer vessel (CTV) or live aboard a service operation vessel (SOV) for two-week rotations. Whether those technicians are seafarers is not a trivia question — it determines which medical safety net, if any, applies to them.

Doubtful cases: the ambiguity is built in

The MLC's drafters knew the definition had grey zones. Article II(3) provides that in the event of doubt, the question "shall be determined by the competent authority in each Member" — in other words, each flag state decides its own borderline cases. Resolution VII, adopted alongside the Convention in 2006, gives the criteria: how long and how often the person is on board, where their principal place of work is, and whether their work is part of the routine business of the ship.

Resolution VII explicitly lists "specialist offshore technicians" among the categories whose status may be doubted, because their work "is not part of the routine business of the ship". But it also warns in the other direction: persons who regularly spend more than short periods aboard "may still be regarded as seafarers" even when their tasks are not maritime, and no category should be excluded automatically. A technician commuting daily by CTV and a technician living aboard an SOV for 14 days sit at different points on that spectrum — and the Convention leaves the call to each flag state.

Where wind technicians stand: the UK position

The clearest published guidance comes from the UK. The Maritime and Coastguard Agency's MGN 471 tightens the ILO wording by adding a decisive limb: a seafarer is a person who works on board a ship "and whose normal place of work is on a ship". A wind technician's normal place of work is the turbine — the vessel is transport and accommodation.

MGN 471's annex spells out the consequences: "Renewables technicians being transported to windfarms to work on a daily basis are not normally considered to be seafarers", and an offshore worker who "only eats and sleeps on the ship may be treated as a passenger — for example windfarm technicians, accommodated on a flotel". A technician resident aboard an SOV for a full rotation may therefore fall outside the definition when the vessel provides transport and accommodation but the technician's principal place of work is the turbine. That is not automatic: MCA says job title is not decisive, duration and principal place of work both matter, and the final determination rests with MCA.

MGN 701, issued in December 2025, confirms the same logic for the new Industrial Personnel Code: wind and tidal turbine technicians are industrial personnel, seafarer status remains a case-by-case assessment against the MGN 471 criteria, and the MCA recommends vessels carry a statement confirming which persons on board are not seafarers. Other flag states resolve the question under their own MLC determinations, and few have published guidance as detailed as the UK's — which is precisely why crewing and HSE managers should ask the question vessel by vessel and flag by flag.

Industrial personnel: a third status since July 2024

Until recently, a technician on a CTV or SOV was legally awkward cargo: not crew, and not comfortably a passenger either. The IMO closed that classification gap with a new SOLAS Chapter XV and the International Code of Safety for Ships Carrying Industrial Personnel (IP Code), adopted by resolutions MSC.521(106) and MSC.527(106) in November 2022 and in force since 1 July 2024.

The IP Code defines industrial personnel as persons "transported or accommodated on board for the purpose of offshore industrial activities performed on board other ships and/or offshore facilities" — explicitly including construction, maintenance and operation of renewable energy installations — and states they are not to be treated as passengers. It requires that industrial personnel be at least 16, provide the master with documentary evidence of medical fitness "based on a standard acceptable to the Administration", and complete basic safety and transfer training before boarding.

But the IP Code is a ship-safety code, not a labour convention. It governs how people are carried and transferred — including training, life-saving appliances and transfer arrangements. It does not amend the MLC or itself confer the MLC's employment rights, shipowner medical-cost liability or repatriation rights. That does not leave industrial personnel unregulated: other flag-state, coastal-state, occupational health and safety and employment rules may apply. In the UK, MGN 701 also sets detailed medical-certification expectations for industrial personnel carried on relevant ships.

	Seafarer (MLC 2006)	Industrial personnel (IP Code)	Shore-law worker offshore
Legal basis	Maritime Labour Convention 2006	SOLAS Ch. XV + IP Code, in force 1 July 2024	National H&S law — in the UK, HSWA 1974 extended offshore by SI 2013/240
Medical care	MLC medical-care rights and shipowner cost duties apply, subject to implementing rules and limited exceptions	Not created by the IP Code; other shipboard, employment and H&S rules may apply	Employer must make adequate, risk-based first-aid provision
24/7 telemedical advice	Standard A4.1 requires free advice to be available to every ship at sea, irrespective of flag	IP status creates no separate personal entitlement, but does not prevent use of the ship's TMAS	No automatic extension of the ship's TMAS to a turbine site; arrangements must follow the risk assessment
Medical certificate	Statutory accepted seafarer certificate under Reg. 1.2 — often ENG1 in the UK	Fitness evidence required; UK MGN 701 accepts several certificates on qualifying domestic voyages but requires ENG1 on international voyages	Work-fitness assessment under applicable law and industry guidance; carriage rules may add certificate requirements
Repatriation for medical reasons	Right applies when the Regulation 2.5 conditions are met, including a condition requiring repatriation when fit to travel	Not conferred by the IP Code; employment, contract and insurance arrangements may apply	Employment, emergency-response and insurance arrangements apply

The gap: who owns medical care for a wind technician?

Strip away seafarer status and the maritime medical safety net goes with it. What remains is national occupational health and safety law. In the UK, the Health and Safety at Work etc. Act 1974 was extended to offshore renewable energy structures by the 2013 Application Outside Great Britain Order, and the Health and Safety Executive — not the MCA — enforces it on wind farms. The turbine is a workplace; the employer owes a duty of care; first aid and medical provision follow from the employer's own risk assessment rather than from any statutory maritime standard.

Unlike offshore oil and gas, offshore wind has no equivalent dedicated safety-case regime and no general rule prescribing one fixed medical model — such as a medic or a commercial telemedicine provider — for every turbine site. That is not the same as having no legal duty. The Health and Safety (First-Aid) Regulations 1981 require UK employers to provide adequate and appropriate equipment, facilities and personnel so employees receive immediate attention if injured or taken ill, with provision determined by a first-aid needs assessment. Wider risk-management duties and HSE's regulatory expectations for offshore-renewables emergency response also matter. G+ guidance on integrated offshore emergency response and medical fitness can help duty holders develop arrangements, but does not replace the legal assessment.

The result can be a split regime on a single vessel. The SOV's marine crew may be seafarers with MLC employment and medical-care rights, while technicians accommodated down the corridor may instead depend on industrial-personnel rules, shipboard health and safety law, their employment arrangements and the operator's risk-based provision. Both groups can be within the ship's emergency and telemedical pathway while on board; the legal basis and responsibility are not identical.

What HSE and crewing managers should take from this

None of this means wind technicians are uncared for. Employers have legal first-aid and risk-management duties, and operators commonly add training, fitness screening, professional clinical support and emergency-response arrangements. The important distinction is that the MLC package does not automatically follow a technician onto a turbine. A private telemedicine contract is one possible part of a risk-based system, not a substitute for the duty holder's assessment or a service guaranteed to every technician by the IP Code.

Three questions follow for anyone responsible for an offshore wind workforce. First: for each vessel and flag in your operation, has anyone determined who counts as a seafarer and which industrial-personnel rules apply, including the correct medical certificate for the voyage? Second: while free TMAS must be available to ships at sea, what pathway applies when a technician falls ill on the turbine rather than on board, and how does it connect to the vessel and emergency-response plan? Third: if treatment ashore, evacuation or repatriation becomes necessary, which legal duty, contract or insurance arrangement governs payment and coordination? Clear, tested answers reduce the risk of delay far from shore.

Sources

Written by Elia Malmsten, Clinical Lead at Alvyri Crew — Swedish-licensed physician, specialist trainee (ST) in anaesthesiology.

Frequently asked

Are offshore wind technicians seafarers?

Often not, but the answer is fact- and flag-specific. Under UK MCA guidance (MGN 471), a seafarer's normal place of work must be on a ship. Wind technicians transported to turbines daily are "not normally considered to be seafarers", and technicians accommodated aboard an SOV may also fall outside the definition when their principal work is on the turbine. Duration and principal place of work both matter, and the final UK determination rests with MCA. Other flag states decide doubtful categories under MLC Article II(3).

What is "industrial personnel" under the IP Code?

Industrial personnel are people transported or accommodated on a ship to perform offshore industrial work — such as wind farm construction and maintenance — on other ships or offshore facilities. SOLAS Chapter XV and the IP Code have applied since 1 July 2024. The Code regulates safe carriage, training and transfer but does not itself confer MLC employment rights such as shipowner-funded medical care or repatriation; other health and safety, employment and flag-state rules may still apply.

Do wind turbine technicians need an ENG1 medical certificate?

It depends on the voyage and the capacity in which the technician is carried. Under UK MGN 701, industrial personnel on relevant domestic voyages may be able to use an ML5, recognised equivalent, OEUK medical, RenewableUK-based medical or another certificate accepted after risk assessment. Industrial or special personnel on international voyages must obtain an ENG1 under that guidance. This carriage requirement does not by itself make the technician a seafarer under the MLC.

Who is responsible for medical care on an offshore wind farm?

Responsibility is shared across the applicable legal and operational arrangements. In the UK, employers must make adequate and appropriate first-aid provision based on need, and offshore-renewables risks and emergency response must be managed under health and safety law. Vessel owners and masters retain shipboard duties, while commercial telemedicine, enhanced clinical cover and insurance arrangements depend on the risk assessment and contracts. The IP Code does not itself create an MLC-style medical entitlement on a turbine.