Rules on diving and caisson work

This information is provided by

Netherlands Enterprise Agency, RVO

There are serious risks (in Dutch) involved in diving. Divers work under excess pressure, in hazardous locations (cold water and ship traffic). They also do heavy work and come into contact witch chemical substances or polluted water.

Reporting diving and caisson work

If your company wants to carry out diving or caisson work, you must report this to the Netherlands Labour Authority (Nederlandse Arbeidsinspectie, NLA, in Dutch) if the work:

  • takes place at a depth of more than 9 meters
  • takes place with a current flowing faster than 0.5 meters per second
  • is expected to involve decompression
  • will be carried out using breathing gas other than air
  • lasts over a week
  • is for underground extractive industry or mineral extraction involving drilling

You must report at least 5 working days before the work starts. You also include a copy of the work plan with your report. You can use the same online form (in Dutch) for reporting both caisson work and diving activities. You need authorisation to use the form. If you do not yet have authorisation you can apply for it online (in Dutch).

If you perform diving activities for mining, wind farms or mineral extraction, you must report this to the State Supervision of Mines (Staatstoezicht op de Mijnen, SodM).

Certification and safety measures

If you work under excess pressure you need a personal certificate (in Dutch) from a recognised training institution (in Dutch). Most certificates are valid for 4 years, except for the Medical Supervision of Diving certificate which is valid for 2 years.

When doing caisson work, you must keep a valid 'Diving and Caisson Equipment Maintenance System' certificate at the work location. A certified diving doctor must examine your employees annually in a work-related medical examination.

A spare diver and a team leader must be present at all times when diving work is carried out. The divers, spare diver and team leader must all hold the relevant work certificates. In addition, someone must be present who holds a 'Medical Supervision of Diving' certificate. All certificates must be kept at the work location. Every diver must keep a diver’s log. Specific rules for the working hours of divers are described in the Working Hours Act (pdf, page 19).

Foreign employees

For divers, dive team leaders, diving physicians, and diver medical attendants from abroad who want to work in the Netherlands the same requirements apply as for Dutch workers. This applies to temporary or occasional work as well as for permanent jobs.

You can have your certificate assessed and approved by a certifying body:

For civilian dive work

  • NDC-CI (Netherlands Diving Centre Certification Institute)
  • Hobéon (in Dutch)

For fire services dive work

For defence dive work

This information is provided by

Netherlands Enterprise Agency, RVO