Guernsey water speed limit reminder from authorities
Users of sea scooters have been asked to "act sensibly" and keep under six knots within bays around Guernsey.
The Harbour Authority and Environment Department said they wanted to remind riders ahead of the summer holidays.
Captain Peter Gill, Guernsey's harbour master, said: "Boat owners have a duty of care and obligation to others. This includes navigating with caution.
"With a little thought and co-operation, all users can have peaceful enjoyment of our waters."
Anyone using a personal watercraft is required to stick to a six knot speed limit while close to shore; only once outside the headlands can they exceed that limit.
In addition all craft must be registered with the Harbour Authority, registration numbers must be displayed on both sides and users must have third party insurance cover.
The rules cover the coastlines of Guernsey, Sark, Herm and the Humps.
Anyone concerned by incidents of speeding close to shore, or reckless riding, has been advised to note the registration details, location, date and time, and contact the police and the harbour office.