RE: Fouled Propeller – Are You Prepared?
You ALWAYS have to fear carbon monoxide if there is any engine running near a compressor. Of course, if everything is shut down, you should be fine. Even filling tanks you have to be careful there's no CO source nearby.
Make sure you're scuba certified before using a hookah system like this. Even though you may only go 2-5' under the boat, the temptation to go down deeper is real tempting. The pressure doubles at about 30'. From there to the surface is where most diving accidents occur.
The answer to the question is yes. I'm a certified scuba diver with full gear on board. Serrated dive knife, hacksaw blade in a handle and a very sharp sheetrock knife to cut stuff off.