ENG1 and the Dutch Seafarer Medical: recognition in the UK and the Netherlands
Seafarers who work internationally are frequently confronted with questions about the validity and recognition of medical certificates. In practice, this most often concerns the ENG1 issued in the United Kingdom and the Dutch Seafarer Medical Certificate.
In the Netherlands, the seafarer medical system falls under the authority of the Inspectorate for the Environment and Transport (ILT). In English-language contexts, this authority is referred to as NSI.
This article does not explain the medical content of the examination itself. Instead, it focuses on the legal recognition and practical use of the ENG1 and the Dutch seafarer medical certificate in the Netherlands, the United Kingdom, and international maritime operations.
International framework and the role of the flag state
Both the ENG1 and the Dutch seafarer medical certificate are based on the Maritime Labour Convention (MLC, 2006). This international convention sets minimum medical fitness standards for seafarers. Responsibility for implementation and enforcement lies with the flag state of the vessel.
The flag state determines:
which medical certificates are accepted;
which authority supervises medical examinations;
under what conditions recognition applies.
This explains why different countries issue different certificates, while the underlying medical standards remain largely the same.
Mutual recognition between the Netherlands and the United Kingdom
The Netherlands recognises seafarer medical certificates issued by designated foreign authorities. The United Kingdom is one of these countries. As a result, a valid ENG1 is accepted in the Netherlands as a recognised foreign seafarer medical certificate.
The Dutch seafarer medical examination is performed by doctors authorized within the Dutch system under the supervision of the Inspectorate for the Environment and Transport (ILT). Click here for official information about the Dutch Sefarer Medical.
Conversely, the United Kingdom recognises the Dutch seafarer medical certificate as an alternative to the ENG1 for service on UK-flagged vessels. This recognition is confirmed by the UK Maritime & Coastguard Agency (MCA) in her medical standards for seafarers.
Because of this mutual recognition, seafarers are generally not required to hold multiple medical certificates at the same time.
Why an ENG1 cannot be issued in the Netherlands
An ENG1 certificate cannot and may not be issued in the Netherlands. This is a direct consequence of the mutual recognition between the Netherlands and the United Kingdom.
The ENG1 is a national UK medical certificate. It may only be issued by doctors who are specifically approved by the UK Maritime & Coastguard Agency (MCA) and who operate within the UK certification system. Dutch-authorised seafarer medical examiners, even though fully qualified to perform seafarer medicals, are therefore not permitted to issue an ENG1.
Omdat het Verenigd Koninkrijk de Nederlandse zeevaartkeuring erkent als alternatief voor een ENG1, bestaat daar ook geen noodzaak toe. Evenzo erkent Nederland een geldige ENG1 als buitenlandse zeevaartkeuring. Juist deze wederzijdse acceptatie voorkomt dubbele certificering en onnodige herkeuringen.
ENG1 and Dutch seafarer medicals in practice
Although the medical assessment itself is essentially equivalent, administrative differences remain. The ENG1 is issued under the UK system and supervised by the MCA. The Dutch seafarer medical certificate is issued within the Dutch system under supervision of the ILT (NSI).
In practice, the distinction mainly concerns:
which certificate is formally requested;
which authority supervises issuance;
the flag under which the vessel operates.
From a medical standpoint, neither examination is stricter or more lenient than the other.
Comparison: ENG1 vs Dutch seafarer medical certificate
| Topic | ENG1 (VK) | Dutch seafarer medical certificate |
|---|---|---|
| Type of examination | Seafarer medical examination | Seafarer medical examination |
| Legal framework | Maritime Labour Convention (MLC) | Maritime Labour Convention (MLC) |
| Supervising authority | UK Maritime & Coastguard Agency (MCA) | Inspectorate for the Environment and Transport (ILT / NSI) |
| Accepted on Dutch-flagged vessels | Yes (recognised) | Yes |
| Accepted on UK-flagged vessels | Yes | Yes (recognised alternative) |
| RYA commercial endorsement | Accepted | Accepted |
The differences are therefore administrative and national, not medical.
RYA commercial endorsement
For a RYA Yachtmaster Certificate with commercial endorsement, a valid medical certificate is required. The Royal Yachting Association (RYA) accepts both a valid ENG1 and a valid Dutch seafarer medical certificate.
Holding a specific ENG1 is not mandatory if a valid Dutch seafarer medical certificate is already in place. Official RYA guidance is here available.
Conclusion
For internationally operating seafarers, the practical difference between an ENG1 and a Dutch seafarer medical certificate is often smaller than expected. As long as the certificate is valid and recognised by the relevant flag state, medical fitness for duty is generally not an issue. Mutual recognition between the Netherlands and the United Kingdom prevents duplicate certification and explains why ENG1 issuance in the Netherlands is neither permitted nor necessary.
General information on the Dutch seafarer medical examination itself can be found on our Seafarer Medical examination page.
FAQ's
The validity of a seafarer medical certificate is laid down by law and depends on age. For persons under 18 years of age, a seafarer medical certificate is valid for one year. From the age of 18, the standard validity period is two years. These rules are based on international maritime agreements and are applied in the Netherlands through the competent authority.
The validity period is always stated explicitly on the medical seafarer certificate. Once this date has passed, the seafarer may no longer perform their duties. Only in specific situations during a voyage can a limited exception apply, allowing work to continue temporarily.
A Dutch seafarer medical examination and an ENG1 are medically equivalent, but administratively different.
Both are based on the same international medical standards. The difference lies in national issuance, certificate format and supervising authority, not in the medical assessment itself.
Yes. The United Kingdom accepts the Dutch seafarer medical certificate as an alternative to an ENG1.
For work on UK-flagged vessels, holding a separate ENG1 is therefore not always required. What matters is whether the flag state formally accepts the Dutch certificate. In many cases, this avoids unnecessary duplicate medical examinations.
The difference between an ENG1 and a Dutch seafarer medical lies in the supervising authority and national system.
The medical standards are equivalent. For seafarers, the key issue is which certificate is formally required by the flag state or employer.
In Amsterdam, a seafarer medical examination can be carried out by ILT recognised physicians, in medical centres such as OmniHealth.
As the Netherlands recognises the ENG1 and the UK accepts the Dutch seafarer medical as an alternative, a single properly issued medical certificate is often sufficient, depending on the flag state and employment context.
The ENG1 and the Dutch seafarer medical are underpinned by international frameworks from both the ILO and the IMO, most notably the Maritime Labour Convention (MLC, 2006) and the STCW medical fitness requirements.
The MLC (ILO) requires seafarers to be medically fit and to hold a valid medical certificate. STCW (IMO) adds medical fitness and certification requirements, particularly for seafarers serving in STCW roles (such as watchkeeping and lookout duties). In practice, flag States implement these international frameworks through their own national systems (for example, the ENG1 in the UK and the Dutch seafarer medical in the Netherlands), and clinicians commonly use ILO/IMO guidance as the professional benchmark for the medical assessment.
An ENG1 cannot be issued in the Netherlands because it is a national UK medical certificate.
The certificate may only be issued by doctors approved by the UK authorities. Dutch maritime doctors are not part of the UK issuing system and are therefore not authorised to issue an ENG1. Due to mutual recognition between the Netherlands and the UK, this usually does not create a practical limitation.
Written by Sven Daam, ILT-, OEUK- and ElementNL-certified medical examiner specialising in maritime and offshore health assessments.
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