"Doug Kanter" wrote in message
news
OK. Just find out (unless you already know) the relationship between water
temp and minutes to death. Isn't it something like 20 minutes, with the
water around 40 degrees? Sometimes, a life vest ends up being just a nice,
fat handle for lifting your corpse. :-)

Yes, something like 50% chance of survival after 20 minutes. But you loos
you ability to do anything about your situation much faster than that. 4-5
minutes maybe.
/Lars J