"Rod" wrote in message
...
Tim Downie wrote:
snip
Serious question, why can't you get bottled natural gas specifically for
use on boats? Given that boat makers can't use the ideal solution (i.e.
drill holes in the bottom to let the gas out), it would seem immensely
sensible to use a lighter than air gas on board boats.

Didn't I hear that the Hindenburg started out as a boat... ??

It was a ship!