As a physician who has treated several cases of CO poisoning (and seen several fatal cases) please install C O detectors in you cabins. Diesel, Gas and Propane can all give lethal amounts of Carbon Monoxide. The toxicity can be insidious and you can die in your sleep! Several years ago there were a series of deaths due to flow through hot propane water heaters in boats. Galley stoves can give lethal levels, so can refrigerator which are not properly vented. The biggest killer in recreational boats are heaters: be it radiant type, alcohol, or even grills taken inside to warm up the cabin. Carbon Monoxide is very dangerous stuff--far more dangerous than Pirates!!! Bob Austin, M.D. Pensacola, FL Symbol 42