I think Jeff's just saying that, if it's difficult or uncomfortable to urinate, you'll skimp on hydration in order not to have to do it, and hydration seems to be a significant factor in preventing DCS.
I don't know the origin of the term, "nickel rocket", but it's used to refer to someone who will take the cheap way out.
I don't know the origin of the term, "nickel rocket", but it's used to refer to someone who will take the cheap way out.