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This is why we always dive in buddy teams:
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if a diver has an equipment malfunction or runs
out of air their dive buddy can rescue them.
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If the diver who has run out of air does not have
a RASS and cannot perform a self-rescue
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their dive buddy will need help them.
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If your alternate air source is not working or your
dive buddy does not know how to use it
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your next best alternative is to share your
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We call this buddy breathing.
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Here, we see the diver on the right has run out of
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The diver on the left is the donor and the diver on
the right is the recipient.
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Notice the hand positions.
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The donor keeps control of the regulator by
holding on to the second stage hose where it
hits the second stage body.
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The recipient holds on to the donor's wrist.
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Think of this skill as if you're doing it in dark
water where you can't see.
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The only time you would let go of that regulator
or that wrist is in order to purge it.
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Other than that, you're going to keep control of it
all the way to the surface.
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When you pass a regulator, you pass the
regulator mouthpiece down so the second stage
doesn't free flow.
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Any time there's not a regulator in your mouth
you need to be blowing a steady stream of
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Two quick breaths; mouthpiece down.
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...mouthpiece down so it doesn't free flow.
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Hand positions: every hand is busy.
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The person that is out of air is reaching straight
across to the donor's left shoulder strap
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being careful not to trap their alternate air source
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The donor is holding their alternate air source
inflator high above the left shoulder.
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Here, the diver can control the buoyancy as both
divers head to the surface.
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Remember: the person that is out of air will not
be able to add air to their Buoyancy
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We'll go around and take a look at hand
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Any time a regulator is not in your mouth make
sure you're blowing a steady stream of bubbles.
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Notice that they are not cross grabbing.
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Any hand that is holding on to something
reaches directly across.
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This way the divers can look at each other as
they're heading to the surface to make sure
everything is OK.
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After you've established a rythm, two quick
breaths, pass the regulator mouthpiece down,
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then the divers will begin to make their ascent.
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If you're the person out of air, it isn't a free ride to
the surface. You still have to kick.
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The person that's the donor, that still has air,
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when they get to the surface will fully inflate their
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and keep the regulator in their mouth, being
prepared to be used as a buoy.
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The person that's out of air has to breathe from
ambient or surface air and orally inflate their BC.
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The donor keeps the regulator in their mouth
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and also pushes up on the recipient.
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A surface view.
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We see the diver on the right, out of air, kicking
hard and orally inflating their BC.
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The donor keeps the regulator in and has their
BC fully inflated.
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