Prevention is the best protection when it comes to fire safety aboard a boat.
These should be mounted on the deckhead (ceiling), 30cm from the cabin sides and within five metres of each protected area of the vessel. On some boats this will mean installing more than one alarm, and it is recommended to choose units that can be linked together.
Carbon monoxide alarms
For boats with fuel burning appliances, an engine or generator aboard, the recommendation is to fit a suitable audible carbon monoxide alarm for an added re-assurance.