NETURAL
BUOYANCY
Let's
look at the fin pivot method for establishing
neutral buoyancy. This method guides
you in getting the feel of neutral buoyancy.
You'll practice doing this several times
in the course, using both your low pressure
inflator and your oral inflator. When
you use your low pressure inflator,
remember to add air in short bursts.
Don't hold the button down continuously,
and release air from your BCD in small
amounts, too.
Basically, here's how you fin pivot:
1)
lie face down on the bottom,
2)
breathe slowly and deeply and
3)
add air in small amounts to your BCD
(or dry suit - your instructor will
give you more ,detail on this if you'll
be using a dry suit), gradually increasing
your buoyancy until you slowly pivot
upward on.
Your
fin tips as you inhale (buoyancy increasing
with lung volume), and slowly pivot
downward as you exhale (buoyancy decreasing
with lung volume). This means you're
neutrally buoyant at that depth and
can fine tune your buoyancy by controlling
your lung volume. Be sure you don't
hold your breath at any time.
If
you have a physical challenge that makes
it difficult to pivot on your fin tips,
you can use your knees or another contact
point for pivoting. However, use your
fin tips if you can because it puts
all your body mass on.
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