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Precision Diving represents the
efforts of Duane Johnson to promote
excellence in dive training. For
individuals seeking high quality
training, I provide a very rigorous
curriculum. I build this program
based on my own personal
experience in Nitrox, Trimix, wreck,
and cave diving.
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By donating the long hose
regulator from the mouth in an
out of air situation one
guarantees that the person
most in need of a clean fully
functioning regulator is going to
get it. The advantage of
donating your long hose
primary is that you are always
ready for this very real
possibility. You are, in essence,
always prepared for any
eventuality rather than
maintaining a fixed picture of
how things should operate
Tip courtesy of Global
Underwater Explorers
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