Hi,
Jon has a good point, time to fly is a problem one the last day
of a trip, and is a good time to freedive.
I recieved the following from the Diver Alert Network (D.A.N.).
" In regards to snorkeling after diving, there are reported cases of divers experiencing DCS symptoms after doing surface dives while snorkeling to depths of 80 feet or more. There is no real evidence that this would cause you to be more susceptible to DCS because the amount of nitrogen taken up by the tissues is small. Breath hold diving DOES however; stop your surface interval time and nitrogen off-gassing. This effect is probably minimal, and provided surface interval times are appropriately extended, the risk of DCS is probably small. There is some concern also regarding vigorous exercise causing bubble formation and possibly causing DCS. There is simply not enough research or information available to make a clear cut, scientific statement concerning the safety of breath hold diving during a surface interval." FD48
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