Carbon monoxide still kills the odd boater (as mentioned in other replies).
I wouldn't run any kind of open flame inside my cabin, even assuming you
have fresh intake air, without a CO detector (but I don't know how reliable
they are). In fact, I wouldn't run a generator anywhere on the boat without
a CO detector.

But what about that? Do you have a generator? Would it make sense to use one
to run an electric heater? That would keep the combustion out of the cabin
itself (although fumes can still get everywhere, and you have to be careful,
especially if there is no wind...).

OTOH, I know that on the few occasions when I've used an electric heater
while on shore power, the heat vanishes almost immediately as soon as I open
the companionway.

====

Charles T. Low
www.boatdocking.com

====

"rosso" wrote in message
news
Hi!

...
We'll be sailing in the northern adriatic sea by christmas time...