A neighbourhood watch style scheme is being set up for boat owners in Bristol harbour after a spate of vandalism.
Lager louts are being blamed for setting boats adrift as a joke
The incidents have included vessels being set adrift after having their mooring ropes untied.
A meeting is to be held on 1 May at Lloyds building on the waterfront to discuss setting up a Boat Watch scheme.
"The problem is more prevalent in the summer with people coming out of bars," said Jane Salvidge, owner of the Bristol Ferry Boat Company.
"They think it's a bit of a laugh and don't really understand the consequences of what they're doing. There are a lot of people who live here on the harbour.
"If you undo a boat completely, the whole thing will drift away and risk crashing into other boats or crashing into the wall and causing damage."
Pc Christopher Hilldrup said: "I'm setting up a new Boat Watch scheme for the Bordeaux Quay site.
"It's about empowering boat owners to contact us, let us know what's going on and to communicate to us problems so we can respond accordingly."