no one can answer
Posted by: RavenWing on Dec-10-12 6:12 PM (EST)
On the face of it a ridiculous question. Not meant as a slam. You seem to be searching for some kind of 'go ahead and do it, no problem' answer from ppl who are relating good bio science and actual experience w. hypothermia and its effects.
Go and try it for yourself with whatever you plan paddling in. Don't go too far from shore: 20 feet at most. Capsize and fully immerse, head and all. See how prone you are to gasp reflex. Stay in the water at least 10 minutes. See how that affects your mobility and awareness. Try to get back in your boat. Do have a witness/friend with the ability to warm you up.
This way you can answer it for yourself. Lots of people here have given your answers based on experience and scientific data re hypothermia and its effects. If you want anything more specific then it needs to get specific to you and your paddling venue - and there's only one way to get to that.