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First and most important rule in scuba...
jshoemaker_1 - 9/18/2012 5:35 AM
Category: Health & Safety
Replies: 5

I was reading a Dive Training article yesterday about Your scuba IQ. The first question was, "What is the most important rule in scuba?" I had an experience in the pool just after my certification that allowed me to answer this without pause. Breathe continuously and never hold your breath.

Of course the reasoning being that air contracts as you go deeper and expands as your depth decreases making a breathe hold on any accent a very quick and easy way to get an over-expanded lung or even an embolism.

Here is my question:

1. Lets say that I just came over a structure and I want to get back down to the bottom (10ft or so). Would there be any possible harm from exhaling all or some of my air and holding that until I reach my destination below?
Eric_R - 9/18/2012 7:59 AM
The real problem is holding your breath if ascending.:)
h2odragon1 - 9/18/2012 8:16 AM
Descending can be just as difficult!

If you are holding your breath on descent, the increased pressure could be uncomfortable!

As LatitudeAdjustment said slow stead reathing is your safest way to descend!

Count to ten while exhaleing, and 5 while inhaleing. Then the reverse on ascent!
DiveBuddyChgo - 11/07/2012 5:42 PM
If you put a marshmellow in a ballon. Added just tiny bit of air. Take it with you on a dive to 10ft. What do you think would happen to the marshmellow. The same that would happen to the soft tissue in your lungs.