Free Dive / Apnea after a dive ????

[Semita]

OK...have seen several people free dive to depths of about 30-35 feet after diving.

This Saturday had someone do it as their Surface Interval....is this good, bad, or does it not matter?

 

[Steve50]

You are affecting the rate of your off gassing (slowing it down) without having a good way of knowing how much.

 

[Cacia]

poor form, I think.

 

[Semita]

You are affecting the rate of your off gassing (slowing it down) without having a good way of knowing how much.

Gotcha....therefore unable to accurately plan your next dives.

Interesting....so it does not increase your levels at all (no air intake)?

 

[Lehmann108]

Gotcha....therefore unable to accurately plan your next dives.

Interesting....so it does not increase your levels at all (no air intake)?

Maybe no air intake, but the pressure of the dive will raise the nitrogen saturation of your blood. As it has been noted, you are impacting the rate of off-gassing of nitrogen (you're slowing it down) but you don't know by how much. You can even get DCS with repeated freedives with too short surface intervals.

 

[fugu42]

Snorkeling is a fine idea during surface interval.
Freedives are not a great idea between dives.
They amount to a series of small bounce dives, re-squeezing bubbles you were trying to off-gas.
I'd prefer to wait after scuba before freediving.

If you do a slow ascent with stop, have minimal absorbed nitrogen, and the freedives are tiny you may "get away" with it.
However, worst case, you could pass a bubble into arterial circulation.
That's bad. see
http://www.gue.com/Expeditions/WKPP/Decompression/nobounce.html

 

[Toolbox-13]

I think its a Bad idea also......you may get away with it for a while but you can only throw the dice so many times before a 7 comes up, I just don't think getting bent is worth the risk

 

[airsix]

Way bad idea.

Bubbles move out of solution and into the lungs where they are trapped until they are exchanged. Re-squeeze them by free-diving, and they don't stay trapped. Re-squeeze them and they can end up in very bad places when you come up again.

-Ben

 

[Semita]

Great feedback....

Last saturday an irresponsible divers that just came out of 34 meter dive was doing APNEA during surfave interval (Down to 35 feet). This adds to the level of irresponsible behavior by an this "alleged" assistant instructor who also ran out of air during the same immersion.

This guy was ridiculous and the worst is that he is working on becoming an instructor.