Book BOSIET or HUET: Offshore Training Enrollment Step by Step

Offshore training enrollment comes down to four things: the right OPITO course code, a valid medical, an approved center with a seat, and the right date. Get the code wrong and your employer rejects the certificate. Get the date wrong and you throw away months of validity — or lose access to the cheap refresher route entirely.

This is the booking guide, not another BOSIET-vs-HUET explainer. If you’re still deciding between the two courses, read BOSIET vs HUET: which offshore course do you need in 2026 first, then come back here to book.

Everything below is checked against OPITO’s published training and assessment standards as of 31 July 2026.

Step 1: Identify your exact OPITO course code

Your employer or crewing manager will usually name a course. What they mean is one of these OPITO standards. Book against the code, not the nickname.

Source: OPITO Training and Assessment Standards Library, accessed 31 July 2026.

A note on “3 days.” Nearly every training page online — including some of ours — describes BOSIET as a three-day course. OPITO doesn’t publish a day count; it publishes guided learning hours. Most centers schedule 5750 across three days and 5295 across one, but that’s a scheduling convention set by the center, not part of the standard. Always confirm the actual timetable with the center before you book flights.

CA-EBS matters. The current standards are built around the Compressed Air Emergency Breathing System. An older certificate issued under a non-CA-EBS version may not satisfy a duty holder who has since moved to CA-EBS. If your certificate is more than a few years old, check the version before you assume a refresher will do.

Step 2: Check your expiry date before you book anything

OPITO sets the maximum interval between BOSIET and the FOET refresher at four years, and FOET enrollment requires a valid, in-date certificate. Those two rules together produce the mistake that costs offshore workers the most money.

Here is the sequence that matters:

• Certificate still in date? You can book FOET (5850) — 8 hours, one day, a fraction of the cost of the full course.
• Certificate expired? FOET entry is closed to you. OPITO’s published entry requirement for 5850 is an in-date BOSIET, T-BOSIET or FOET certificate. In practice that means going back through the full BOSIET, though the exact remedy is set by your duty holder rather than by OPITO. Confirm with the operator before you pay for anything.

The 90-day booking window nobody tells you about

OPITO’s standards contain a date-alignment rule that quietly rewards booking late and punishes booking early:

If your previous certificate expires within three months of the new course (90 days for HUET 5295), the new certificate is dated from the old expiry date — not from the training date — unless the duty holder, asset owner or operator says otherwise.

Read that the other way round. Train four months before expiry and, in the ordinary case, the new certificate runs from the training date, so you’ve thrown away roughly four months of paid-for validity. Train inside the 90-day window and the clock picks up where the old one stopped.

Practical rule: book your refresher to run in the last three months before your certificate expires — not sooner. For a first-time BOSIET there’s no window to worry about; book as soon as you have a medical and a start date.

You can check the status and authenticity of any OPITO certificate — yours or a new hire’s — free, using OPITO’s certificate validation checker. You’ll need the surname and the certificate reference.

Step 3: Sort your medical before you sort your seat

This is the most common reason an enrollment collapses at the door. Practical, in-water training has a health gate, and OPITO writes it into the standards for 5750, 5850 and 5295.

You must hold one of the following:

• a valid current offshore medical certificate
• an employer-approved equivalent
• a valid medical certificate of fitness to work at sea
• a valid certificate of medical fitness for diving at work
• or, failing all of those, a completed medical screening form issued by the OPITO approved center itself

That last option is the one most seafarers miss. If you don’t hold an offshore medical, an approved center can screen you on its own form — which means a missing OGUK-style certificate doesn’t automatically block you. It does, however, need arranging in advance, and the center decides.

For UK shallow-water CA-EBS training specifically, OPITO’s Route B wording names an OEUK, equivalent, fitness-to-work-at-sea or AMED certificate, plus a learner declaration signed on the day before entering the water.

Already hold a seafarer medical from your flag state? In many cases it satisfies the “fitness to work at sea” limb. Send it to us with your booking request and we’ll get it confirmed with the center before you travel — that check is free and takes a day.

Step 4: Check whether you need a shoulder breadth measurement

If you’ll fly offshore in the UK sector and certain other regions, the duty holder may require a recorded shoulder breadth measurement before you can board a helicopter. OPITO flags this on the BOSIET, FOET and HUET standards as an employer and regulator requirement rather than a course entry condition, and publishes a separate product for it (standard 9365). Approved centers offering it are filterable on OPITO’s center network.

It is not a pass/fail on your training. It is a very common reason a fully certified worker gets stopped at the heliport. Ask your employer whether your destination requires it, and if so, book it alongside the course rather than after.

Step 5: How to enroll in a BOSIET or HUET offshore training course online

Once the code, the medical and the timing are settled, enrollment itself is straightforward.

1. Send us your details. Rank or job title, the operator or vessel you’re joining, your destination region (this decides cold-water vs tropical), your existing certificate if you have one, and your target join date. Send it through the contact form or message us on WhatsApp.
2. We confirm the course and the center. We check your certificate status and expiry window, confirm which OPITO code your employer actually needs, verify that your medical satisfies the standard, and identify an OPITO approved center with availability that fits your rotation. OPITO’s network runs to more than 240 approved centers across over 50 countries.
3. We reserve your seat and send the joining instructions. You’ll get the center name, address, dates, the exact standard code being delivered, the fee, and the document list — before you commit.
4. You attend and certify. The center delivers the training and issues the OPITO certificate directly to you. Verify it yourself on the OPITO checker the same week.

If you also need a seaman book or CDC or STCW certification, say so at step one — sequencing the training around the documentation usually saves a trip.

Start your offshore training enrollment →

What to bring on the day

Requirements vary by centre, but expect to be asked for:

• photo ID (passport preferred)
• your medical certificate, or the completed centre screening form
• your existing OPITO certificate, if you’re doing a refresher
• swimwear and a towel — the in-water modules are not optional
• any employer or sponsor letter, if the operator is paying

Contact lenses, prescription goggles and medical conditions such as ear or sinus problems should be declared to the centre in advance rather than raised at poolside.

What does it cost?

Course fees are set by each approved centre, not by OPITO, and they vary widely by country, currency and season. OPITO publishes standards, not prices, so any single figure quoted online as “the BOSIET price” is that provider’s price and nothing more.

Fees also move with what’s bundled — CA-EBS delivery, shoulder breadth measurement, medical screening, accommodation and airport transfer are sometimes included and sometimes not. When you compare quotes, compare the standard code and the inclusions, not the headline number.

Tell us your region and target dates and we’ll come back with current quoted fees from approved centres that have availability. No estimate here would be worth the pixels.

Which course should you actually book?

• Never worked offshore, heading to the North Sea or another cold-water region → BOSIET with CA-EBS (5750).
• Never worked offshore, heading somewhere tropical → T-BOSIET (5501).
• Certificate still in date, cold-water region → FOET with CA-EBS (5850).
• Certificate still in date, tropical region → T-FOET (5614).
• Certificate expired → confirm the remedy with your duty holder; expect to repeat the full course.
• Employer wants helicopter escape only → HUET with CA-EBS (5295) — but get that requirement in writing, because most offshore roles need the full BOSIET.

Not sure which line you’re on? Send us your certificate and your joining details and we’ll tell you, free, before you book anything.

Frequently Asked Questions – Offshore Training Enrollment

How do I enroll in a BOSIET or HUET offshore training course online?

Send your rank, destination region, target join date and any existing OPITO certificate to a coordinator or directly to an approved centre. Your course code, medical status and expiry window are confirmed first, then a seat is reserved at an OPITO approved centre and joining instructions are issued before payment.

How long is a BOSIET certificate valid?

OPITO sets a maximum four-year interval between completing BOSIET with CA-EBS (standard 5750) and completing the FOET refresher (5850). Tropical BOSIET (5501) follows the same four-year interval to T-FOET (5614). Your duty holder can impose a shorter interval, so confirm before you plan.

What happens if my BOSIET certificate has already expired?

FOET enrollment requires a valid, in-date certificate, so the one-day refresher route closes once you lapse. In practice most workers repeat the full BOSIET, but OPITO does not publish a blanket rule — the remedy is set by your duty holder or operator, so confirm with them first.

When is the best time to book my FOET refresher?

Inside the last three months before your certificate expires. OPITO’s standards align the new certificate to your old expiry date when training falls within that window, so you keep the validity you paid for. Book four or more months early and you can lose the difference.

Do I need an offshore medical to attend BOSIET?

Not necessarily. OPITO accepts a current offshore medical, an employer-approved equivalent, a fitness-to-work-at-sea certificate, a diving medical, or a medical screening form issued by the approved centre itself. Many seafarers qualify on their existing flag-state medical — have it checked before you travel.

Can I take HUET without BOSIET?

Yes, HUET with CA-EBS (standard 5295) is a standalone OPITO course. But it covers helicopter escape only, and most offshore operators require the full BOSIET for first-time workers. Get your employer’s requirement in writing before booking HUET alone.

How many days is BOSIET?

OPITO publishes guided learning hours, not days: 20 hours 40 minutes for BOSIET with CA-EBS. Most approved centres schedule this across three days, but the timetable is set by the centre, not the standard. Confirm actual dates before booking travel.

How do I check that my OPITO certificate is genuine?

Use OPITO’s free public validation checker at thehubopito.com/public/validate. Enter the learner’s surname and the certificate reference. Employers and crewing managers can also validate certificates in bulk. Do this the week you receive a certificate, not the week you need it.

What is a shoulder breadth measurement and do I need one?

It’s a recorded body measurement some duty holders require before offshore helicopter travel, notably in the UK sector. OPITO covers it under a separate product (standard 9365) and lists centres that offer it. It isn’t a training pass/fail, but it can stop you at the heliport.

Book your course

Offshore training enrollment is not complicated, but it is unforgiving of small mistakes: the wrong code, a lapsed certificate, a medical that doesn’t qualify, or a booking made three weeks too early.

Two things to do right now. Find your existing certificate and check the expiry date against the 90-day window. Then confirm with your employer which OPITO standard number they actually require — 5750, 5850, 5295, 5501 or 5614.

Send us both and we’ll do the rest: course confirmation, medical check, approved-centre seat, joining instructions.

Book your BOSIET or HUET course → · Contact our team · WhatsApp +971 55 458 3416

Atomiq Group has supported seafarers and offshore personnel with maritime documentation and training coordination from Dubai since 2011, and is ISO 9001:2015 certified.