It's a gas valve. Watch is rated to 1000ft (because I do so much diving). I'm using an airboss and a custom briefcase from redoxx today. Plus whatever that little utility bag is called.
I went to NUKA in Haiku town. The head chef used to work at Morimoto, and we ordered omakase. It was without a doubt the best sushi experience I've ever had.
As an example, this is oyster ponzu nigiri.