Offshore Medical Requirements: A Crew Compliance Checklist

Offshore medical requirements exist to catch problems before they become an emergency at sea or in a remote field location. The cost and safety implications of a crew member getting ill and having to return to the heliport are too great for proper screening not to be in place. 

This guide sets out what employers in the oil, gas and energy industries are required to do to issue a deployment clearance to their employees. This includes the OGUK medical certificate, fitness-to-work assessments, drug and alcohol testing, fatigue risk checks, and the vaccination and travel health check. Whether for a single hire or part of a large rotating shift, the objective is the same: to have everyone signed off, documented, and fit for work.

Key Takeaways

• The OGUK medical certificate is mandatory for most UK offshore roles and must come from an approved examining doctor, not a general GP or occupational health check.
• A fitness-to-work assessment and a valid offshore medical certificate are not the same thing. Employers often need both, depending on the role.
• Drug and alcohol testing, fatigue risk checks, and vaccination status all sit under the same pre-deployment umbrella, even though they’re assessed separately.
• Duty of care for a crew means risk-tiered checks by role and rotation pattern, not a single blanket policy for everyone.
• Good record-keeping matters as much as the checks themselves: a compliance team should know who’s covered and when the next review is due without chasing anyone down.

What the offshore medical certificate covers

The offshore medical certificate confirms that the worker is fit to travel to and work on an offshore installation. The health check issued as part of the medical certificate is designed to identify any conditions which may put the worker or others at risk.

Offshore medicals differ from standard pre-employment health screenings. A general health screening will assess an individual’s health for desk-based roles. An offshore medical assesses an individual’s health to establish whether they can be safely rescued in the event of an emergency.

The medical certificate for offshore workers must be issued by an approved examining doctor. In the UK, this would be an OGUK-approved doctor or, for seafaring, an MCA-approved doctor for the ENG1 medical.

The offshore medical is generally valid for 2 years; however, this can decrease with the worker’s age and with medical conditions found at previous medicals. It is suggested that the offshore medical renewal date is recorded in the same system used for other compliance requirements to avoid confusion.

OGUK medical certificate: Who needs one and when

The OGUK medical certificate is intended for individuals travelling for offshore work. This includes permanent crew members, contractors, and single-trip visitors, such as engineers or inspectors travelling offshore for a single visit.

The OGUK medical is only valid for the UK Continental Shelf. It was established by the offshore industry and medical bodies to ensure a consistent standard and to enable workers to move from contract to contract without having to repeat medicals.

It’s only valid if it’s issued by a doctor who’s been approved under the OGUK scheme. The doctors have been specifically trained to assess workers for offshore work. Medicals examine aspects such as confined space working and the cardiovascular demand of evacuation by helicopter or lifeboat in an emergency situation.

As workers get older, they are reviewed more frequently. For example, workers under the age of 40 are issued with a medical for offshore work for a period of 2 years. Letting this lapse whilst mid-rotation is one of the more common compliance issues. The medical can expire whilst the individual is offshore, and it is not possible to renew the medical if the individual returns to onshore facilities. Therefore, tracking renewal dates, as well as dates for vaccinations and other compliance issues, is particularly important to ensure that all workers are properly compliant at all times.

The pre-deployment compliance checklist

Four areas make up the core of a pre-deployment check. Each is assessed separately, but a crew member isn’t fully cleared until all four are signed off. 

Fitness-to-work assessment

A fitness-to-work assessment is completely different from an Offshore Medical and essentially looks at whether someone can do their job (physically and mentally) on a day-to-day basis. This assessment would typically be carried out at the same time as the Offshore Medical but would specifically look at the tasks that the individual carries out daily.

Vaccinations and travel health

As mentioned earlier, deployments can be to regions further afield, and include rabies risk or areas with limited medical access. This means that for the vaccinations and travel health section of the checklist, the deployment location and job will play a larger role. Postings to remote or off-grid sites raise this further, since medical kits, rabies cover, and evacuation planning all need to be worked out well before departure, not arranged once someone’s already on site.

Drug and alcohol testing in the workplace

Drug tests in workplace policies for offshore and energy roles will be more stringent than normal workplace testing policies, because of the safety-critical nature of the work. Such policies will set out pre-deployment testing and subsequent testing at regular intervals during employment, with clear consequences for positive test results.

Fatigue risk assessment

In a fatigue risk assessment, the impact of a worker’s rotation, their working shift pattern, and the time spent travelling to and from work are all considered. Many factors determine when a worker becomes a safety risk, since fatigue builds up differently across a two-week rotation than it does in a standard working week. This test is often overlooked, and as a result, workers are unaware of the fatigue risk that they are placing themselves in.

Pre-employment medical examination vs ongoing reviews

There is a big difference between a one-off pre-employment medical examination to establish if someone can safely start in a new role, and ongoing health reviews. 

A pre-employment medical examination is intended to allow a person to start work as safely as possible. The pre-employment examination provides a baseline from which subsequent health reviews can identify changes in a person’s health, caused by, for example, age, a new health problem, or the cumulative effect of repeated exposures to high-risk situations during a rotating contract or long-term posting.

How often do you need to review someone’s fitness for work? The answer to this depends on the individual’s role. For office-based staff who travel occasionally, you would only need to complete the pre-employment medical examination and then complete their OGUK medicals for renewal of their certificates. Field-based crew who undertake constant offshore or remote work would require more frequent reviews. Some of these could be triggered by health-related issues, changes in work type, and even age-related issues.

By ensuring the date for the pre-employment medicals is included in the single schedule for the ongoing reviews, the compliance team is not left holding a certificate that has expired during a rotation.

Duty of care and record keeping for crews

By sending employees to work in offshore or remote locations, health screening becomes the employer’s duty of care and must therefore be managed as a group rather than on an individual basis. In other words, employees must be able to prove, collectively, that they are fit for work.

Is an occupational health assessment a legal requirement? In short, yes, for most offshore and safety-critical roles as part of industry standards or as the employer’s duty of care. The actual health assessment required will be determined by the worker’s role and the relevant regulatory body’s requirements. We would always recommend that a clinician or compliance advisor confirm any requirements for specific roles.

Recording the four areas of the health screening checklist for offshore work in one system is so much easier than setting up four separate systems for individual employees. In such a system, a member of a company’s compliance team can instantly answer questions such as “Who is covered” or “When is their next review due?”

Field teams that are constantly exposed to risk of illness and injury require more frequent health checks than office-based staff. The health checks for a crew that is on a two-week-on, two-week-off roster would be different from the health checks for someone travelling to a remote site for a short site visit. Treating both groups the same would result in either over-checking of low-risk workers or under-checking of high-risk workers.

Occupational health and vaccination support at London vaccination clinic

For one person, it’s easy to manage a ‘to-do’ list for vaccinations and travel health. However, for a full rotating crew, this will create a lot of administrative work for a company. 

Our team of health professionals can undertake group vaccinations, including conducting on-site vaccinations. We arrange the necessary vaccinations and travel health for each specific posting, rather than providing the team with a generic travel jab list.

Our occupational health services can maintain records for individual staff or as part of a larger group to ensure that individuals are covered and that reviews take place at the appropriate time. This can be particularly useful for the compliance teams at companies with personnel on multiple postings or working as part of a rotating crew.

Whether you’re arranging cover for a single deployment or a whole rotating team, London Vaccination Clinic can support both the health screening side and the ongoing record management that keeps a crew compliant.

Ready your crew, not just the paperwork

Offshore medical requirements exist for a reason: they catch problems before deployment turns them into an emergency at sea or a costly evacuation. The OGUK certificate, fitness-to-work assessment, drug and alcohol testing, fatigue checks, and vaccination status all sit under one duty of care obligation, even when they’re assessed separately.

Treating them as four connected pieces, tracked in one system, is what keeps a compliance team ahead of expiry dates instead of chasing them mid-rotation. Whether you’re clearing a single hire or managing a full rotating crew, the goal stays the same: everyone signed off, documented, and genuinely fit for the job ahead. Speak to a clinician about building that checklist for your team.