Skittl1321
Contributor
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The term is "cold water immersion diaresis" and while keeping warm would affect this, there is also (as noted above) a pressure component, in that the hydrostatic pressure causes an increase in blood pressure. So proper exposure protection will help, but some of us still gotta go.
Interesting to hear there is a pressure component- I find it harder to pee when deep. In fact, I noticed I had to pee at the end of nearly every dive (and based on the number of people who dove back in to check the props after their tanks were off, others did too- or maybe people just really like those propellers; great piece of machinery) but rarely was able to pee while diving. Shallow (and much colder) dives at home, I usually would go; but part of that was just for warmth; I could have waited. You know, like I wait everyday until break time because I'm highly discouraged from peeing in my office.
If I had rented my wetsuit, I could have refrained from going as asked.
Of course, with my SAC rates most of my dives were under an hour.