Questions of safety with propane on boats have long been addressed. The
real problem with absorption cycle refrigeration (gas refrigerators) is
that they must stay within 5 to 7 degrees of vertical. That makes them
great for RVs and maybe power boats but not for sailboats.
--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com