Quote:
Originally Posted by GDiver
i think peeing in the suit in really cold water is about the same as going from outside on a cold winter day to inside for about a minute to warm up and then going back outside. i always seem to feel colder if i do that.
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Only if you wait until it's already too late. It should be more like going out in the cold when you're all warm and bundled up, and coming back in briefly to take the chill off before you ever really get cold.
If you start a cold water dive by pouring warm water into your suit, that water should help you to retain the heat you already have, as you won't be expending energy to heat that insulated layer of water up. It will cool off over the course of the dive though, and as it cools you'll cool with it. If you "re-warm" that water by peeing in your suit, you can effectively defer the onset of rapid body heat loss until later in the dive, which can be a real boon if, for example, you do it right before turning the dive, as it'll let you get back to the boat or shore before you begin to suffer any of the seriously detrimental effects of cold.
On the other hand, trying to warm up an already cold suit with urine is of questionable value, although it'll probably feel good for a few minutes. The idea is to avoid getting cold in the first place, not to warm up when you're cold already.