What is the ENG1?
The ENG1 is the MCA Seafarer Medical Certificate — officially documented on MCA Form ML5. It is the standard medical fitness certificate required of all professional seafarers serving on commercial vessels under the UK flag and most other major flag states. The ENG1 confirms that you are medically fit to serve at sea in your designated role.
The name ENG1 comes from the MCA's internal form numbering — but in the yachting industry and at crew agencies, it is universally referred to simply as "the ENG1". If a captain, agency, or crewing platform asks whether you have a valid medical, they mean the ENG1. A standard GP medical or sports physical does not substitute for it.
The ENG1 exists because working at sea creates risks that are not present in shore-based employment: remote locations far from emergency medical care, physical demands of seamanship, and the safety implications for fellow crew if a member suffers a sudden medical event offshore. Ensuring that all crew meet a consistent medical standard protects both the individual and the vessel.
Who needs an ENG1?
All professional seafarers serving on commercial vessels are required to hold a valid ENG1 under the Maritime Labour Convention 2006 (MLC) and the applicable national regulations. In the UK this is enforced by the MCA. For yacht crew this means:
- Crew on any commercially operated yacht (charter or private with paid crew), regardless of size
- Crew on vessels operating under the Large Yacht Code (LY3) or MCA's Small Commercial Vessel codes
- Crew on yachts flagged in the UK, Cayman Islands, Marshall Islands, Isle of Man, Gibraltar, Malta, and most other flag states with equivalent MLC implementation
You do not need an ENG1 if you are sailing recreationally on a privately-owned vessel as a guest or unpaid crew member. If you are being paid — even informally — the commercial vessel rules apply.
Important: Never work on a commercial vessel without a valid ENG1. If a vessel's flag state inspector or port state control officer discovers crew working without a valid medical certificate, the vessel can be detained and the owner, captain, and crew member may all face penalties.
What does the ENG1 examination involve?
The ENG1 is a structured medical examination carried out by an MCA-approved medical examiner — a qualified doctor who has been specifically trained and approved by the MCA to conduct seafarer medicals. You cannot get an ENG1 from your regular GP unless they are also on the MCA's approved list.
The examination covers:
- Vision — visual acuity and colour vision. Standards differ depending on whether your role requires watchkeeping. Corrected vision is acceptable for most roles.
- Hearing — the doctor will assess whether you can hear safety instructions and alarms at sea. Hearing aids are permitted for some roles.
- Cardiovascular health — blood pressure, heart rate, and general cardiovascular fitness. An ECG may be required for older seafarers or if the doctor has concerns.
- General health assessment — your medical history, current medications, any chronic conditions, mobility, and neurological status.
- Drug and alcohol screening — not all doctors routinely screen, but they may do so and are entitled to. Vessels operating under certain flag states or with specific owners' requirements may insist on a drug test as part of employment, separately from the ENG1 examination itself.
- Mental health — the doctor will make a general assessment of psychological fitness for sea service. Disclosure of mental health conditions does not automatically disqualify you; stability and effective management are the key factors.
The entire appointment typically takes 30 to 60 minutes. If everything is straightforward, the doctor issues your ENG1 certificate on the day.
What if the doctor has concerns?
If the examining doctor identifies a potential issue, they have several options. They may:
- Issue a restricted ENG1 — valid for your role but with a note limiting the type of vessel or waters you can serve on (for example, restricting you to near-coastal operations)
- Issue a one-year certificate rather than two years, to allow for more frequent review of a manageable condition
- Refer you to a specialist for a further assessment before issuing the certificate
- In rare cases, decline to issue the certificate and recommend you seek further medical advice
A failed or restricted ENG1 is not necessarily permanent. Many conditions that give a doctor pause can be reassessed after treatment, lifestyle changes, or specialist review. The MCA also has an appeals process for seafarers who believe a refusal was made incorrectly.
If you have a specific medical condition you are concerned about, it is worth contacting an MCA-approved doctor informally before booking your formal appointment. Most are happy to advise in general terms whether your circumstances are likely to be an issue.
How much does an ENG1 cost?
In the UK, an ENG1 examination typically costs between £100 and £150. Prices vary slightly depending on the doctor's location and practice — doctors in central London tend to be at the higher end; those in regional maritime hubs (Southampton, Plymouth, Falmouth, Bristol) are often closer to £100.
There is no NHS route to an ENG1 — it is a private medical examination and the full cost is payable directly to the examining doctor. Some employers and crew agencies will reimburse the cost of your ENG1 as part of onboarding. It is worth asking when you receive a job offer.
ENG1 validity and renewal
Your ENG1 is valid for two years from the date of examination. Exceptions:
- Seafarers aged 65 or over may receive a one-year certificate
- Seafarers with a monitored medical condition may receive a one-year certificate at the doctor's discretion
Your ENG1 must be valid at all times while you are serving on a commercial vessel. If it expires during a voyage, technically you should not continue to serve until you renew it. In practice, captains and owners are vigilant about this — it is your responsibility to keep it current, and most professionals renew several weeks before the expiry date to avoid any gap.
YachtSync tracks your ENG1 expiry date and sends you a renewal reminder in advance, so you never find yourself scrambling for an appointment at short notice.
Track your ENG1 in YachtSync. Add it once, get reminders before it expires. The free tier covers 20 certificates. No card required.
How to find an MCA-approved ENG1 doctor
The MCA publishes the official register of approved medical examiners on the MCA website. Approved doctors are available throughout the UK and in major overseas yachting hubs including Antibes, Palma de Mallorca, and Fort Lauderdale.
You can also search for approved ENG1 doctors through the YachtSync training directory, filtered by location. Most approved doctors offer appointments within a few days, and many can see you at short notice during the busy pre-season period (February to May).
Find MCA-approved ENG1 doctors on YachtSync →
When booking, confirm:
- The doctor is currently on the MCA approved list (approval can lapse)
- They issue the ENG1 on the same day if everything is straightforward
- Whether you need to bring any existing medical records or a list of current medications
Frequently asked questions
Can I sail commercially without an ENG1?
No. The ENG1 is a legal requirement for all professional seafarers on commercial vessels under the Maritime Labour Convention and UK regulations. Working without a valid ENG1 is a regulatory breach that can result in the vessel being detained and the crew member being removed from service. Some very small domestic vessels operate under alternative codes, but for any standard yacht crew position, an ENG1 is mandatory.
How long does an ENG1 take?
The examination itself takes 30 to 60 minutes. You can usually book an appointment and complete it within a few days. The certificate is issued on the day in most straightforward cases, making it one of the quickest mandatory documents to obtain — certainly faster than arranging STCW training.
What medical conditions can fail an ENG1?
The MCA medical standards cover vision, hearing, cardiovascular health, neurological conditions, and mental health. Conditions that may affect the outcome include severe uncorrected vision or hearing impairment, uncontrolled epilepsy, unstable cardiovascular conditions, and insulin-dependent diabetes (depending on role and history). Many managed conditions do not automatically fail the exam — the doctor assesses your individual circumstances and can issue restricted or shorter-validity certificates where appropriate. If you have a specific concern, contact an approved doctor for informal advice before your appointment.
Where can I get an ENG1?
Only from an MCA-approved medical examiner. The MCA publishes the official list on its website. You can also search by location through the YachtSync training directory. Doctors are available throughout the UK and in the main overseas yachting hubs. Your regular GP cannot issue an ENG1 unless they are also on the MCA approved list.
Find MCA-approved ENG1 doctors on YachtSync.
Search by location, book your appointment, then track your ENG1 expiry in the app alongside all your other crew certificates.
Find ENG1 doctors near youYachtSync is free for crew — 20 certificates, expiry reminders, instant sharing. No card required.
Related guides: STCW certification guide → · How to become yacht crew → · Yacht crew career path →