Most boats that do use propane...and they are few because their hull
shape makes Propane dangerous on board...most boats have the  propane
isolated in a locker that is air tight (to the inside of the hull) and
vented overboard. But if the stove or the heater ever somehow springs a
leak, the gas will fill the hull because obviously there are no leaks to
let that gas escape to the atmosphere until it fills up to the lowest
porthole or hatch.  Not such a big danger when the boat is underway because
there is air circulation below..but when the boat is in in's slip in the
marina and all secured...the propane can 'pool' in the bilges and the lower
portions of the cabin and cause big boom.

On Wed, Jul 18, 2012 at 9:20 AM, Dave Mcneely <mcneely4@cox.net> wrote:

> Thanks Jim.  Now a question about propane and a boat:  Positive venting?
>  What makes certain there is no gas accumulation?  mcneely
>
> ---- Jim Arnott <jrasite@EONI.COM> wrote:
> >
> > On Jul 17, 2012, at 9:21 PM, <mcneely4@cox.net> wrote:
> >
> > > Jim, you'll have to point us to it.  The link just brings up a
> > > catalog, and nothing is obvious.  But the oven shown looks
> > > interesting.  mcneely
> >
> > http://tinyurl.com/c4etzc8
> >
> > Seaward Princess 2-Burner Propane Gas Slide-In Gimbaled Stove
>
> --
> David McNeely
>