The December 2025 issue of The Regulator, published by NOPSEMA, contains two key updates for hyperbaric workers. The first is the release of updated Diving Guidelines, and the second brings focus to the importance of regulating psychosocial hazards in the workplace.
Changes to Onshore DMT Timeframes
Following feedback from license holders and ADAS schools, the Onshore Diver Medical Technician (DMT) certification timeframes have been extended. These changes have been made to make refreshing the certification easier for license holders, and improve the usability of the certification by extending its validity period from 24 months to 36 months.
The change to the refresher course timeframe is as follows: an Onshore DMT refresher course can be undertaken at any stage from six (6) months before the expiry date and up to six (6) months after the expiry date.
The length of the certification validity has been extended to 36 months, or three years. Once a refresher course has been completed, the validity date of the new certificate will run for a further three years from the expiry date of the current certificate
Once the certification has expired for more than six (6) months, a full Onshore DMT course must be undertaken.
If you have any questions about the new timeframes for Onshore DMT certifications, please contact ADAS.
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