A reminder has been issued to sea scooter riders to take care when in Guernsey's harbour at St Peter Port.
Concerns have been raised about such riders taking risks with their safety by crossing the paths of cruise liners, against harbour rules.
Harbour master Peter Gill told the BBC: "Groups have also been seen jumping across the wake of commercial ferries."
He said legal action may be taken against those flouting the laws, which may help prevent the recurrence of such incidents.
Visitors travelling to Guernsey on Condor ferries
may be pleased stern action is being promised to ensure incident-free arrivals.
One interesting activity to undertake on Guernsey is to explore the history of its occupation by the Germans in the Second World War.
The Channel Island Occupation Society carries out regular lectures and walks exploring this period in the life of the islands, which were not liberated until the very end of the war.
Posted by Andrew Smith