NETURAL
BUOYANCY
By
now you're aware that you need to maintain
neutral buoyancy while diving to avoid
bottom tact, so you can relax and maneuver
easily, and - you can prevent rapid,
uncontrolled ascents and descents. In
the last confined water dive, you adjusted
your weight for neutral buoyancy at
t1 surface. During this dive, you'll
develop your n buoyancy skills further.
You've
undoubtedly found that you need to use
your BCD to trim and fine-tune buoyancy
when you descend and ascend. due to
exposure suit compression, and due to
air compressing and expanding in your
BCD. When making changes to your buoyancy,
whether adding or releasing air, do
it slowly. Rapid changes make it difficult
for you to control buoyancy and can
lead to runaway ascents or descents.
You've
probably been using mainly your low
pressure inflator to fill your BCDunderwater.
To orally inflate your BCD underwater
- which you might do if You had a low
pressure inflator problem for instance,
take your second stage in your right
hand and the BCD inflator in your left.
Take a breath, remove the regulator
and blow about two thirds of this air
into your BCD, operating the controls
just like you did when orally inflating
it at the surface. Save enough air to
clear the regulator, and don't forget
to blow a stream of bubbles as you switch
back and forth - never hold your breath.
Do this until you've inflated the BCD
sufficiently to attain neutral buoyancy.
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