Seven dive groups will be exploring St Peter Port Harbour on Christmas morning, as they search the seabed for fresh scallops, old artefacts and other interesting finds.
Diving in St Peter Port Harbour is only possible on Christmas Day, by prior permission from the Harbourmaster, due to the small number of scheduled commercial vessel movements.
It has become a popular festive tradition for some and previous dives have unearthed some historic artefacts. A 3rd Century Gallo Roman shipwreck known as 'Asterix' was famously discovered by local diver Richard Keen in the harbour entrance in 1982.
This year, 28 people are set to be involved, with some of those diving and the others on support vessels. The dives will take place in the area of the Pierheads at intervals between 8am and midday.
All these groups have provided appropriate risk assessments and safety plans. All divers are required to have a surface marker buoy and be accompanied by a support vessel with marine VHF Radio monitoring Guernsey VTS (channel 12) at all times.
Head of Port Operations Jerome Davis said: "Christmas Day is the only day on which diving by organised groups can be carried out safely in the designated harbour areas.
"I would like to thank our staff who will be providing cover for the hyperbaric chamber at the Princess Elizabeth Hospital should the need be required."