Word to the wise and I've never seen it mentioned when talking about O2 on board. Take extra care to secure the valve AWAY from the outside of the boat - ie mount inboard as much as possible and valve forward. Also, double check to make sure you've got a good fire extinquisher on board.

Reason being - An impact could send that valve off like a rocket as in an impact from another boat or while trailering - a wreck.

Also, O2 is not flamable, but you ever fed raw O2 to an existing flame? Wooosh!

Wannabe...