"This edition of the guidance has been revised in order to improve safety for shellfish divers, update references and provide consistency with the diving at work ACOPs where appropriate. This document has also been updated to reflect changes in technology and industry practise.
The most significant changes relate to:
(a) Approved qualifications. From 1 November 2022 HSE will no longer approve recreational diving qualifications for commercial shellfish self-contained underwater breathing apparatus (SCUBA) diving. Prior to this date experienced shellfish divers will be able to apply for approval to continue working. For any new entrants to the industry the minimum approved diving qualification will be HSE SCUBA or equivalent.
(b) Dive teams. There is new guidance on the minimum recommended dive team size.
(c) Equipment. There is new guidance on the use of full-face masks, dive computers, diver recovery equipment and personal location beacons.
(d) Partial pressure of oxygen. The maximum recommended partial pressure of oxygen for breathing gases has been changed to 1.4 bar. This is to ensure consistency with the diving ACOPs.
(e) The availability of compression chambers. This change is to reflect medical advice and ensure consistency with the diving ACOPs. Commercial shellfish diving in inshore water Page 2 of 17
(f) Electrofishing. A new section has been added on electrofishing to reflect current and future activities permitted by the relevant authorities."