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Safety Stop: Why Do I Need To Do It?
Read more: http://www.dive.in/guide/safety-stop-why-do-i-need-to-do-it/#ixzz2wJKl3Hj6
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Safety Stop: Why Do I Need To Do It?
Read more: http://www.dive.in/guide/safety-stop-why-do-i-need-to-do-it/#ixzz2wJKl3Hj6
Follow us: @divein_news on Twitter
We generally see scuba diving as a fun sports
activity that we are simply passionate about.
To become a good scuba diver we need to
receive professional training and then get into the water. That is true,
but that is not all.
We need to always remember a few important aspects
of diving, and we can never afford to forget the safety rules while indulging
in this fun sport.
Safety stop is something we need to be cautious
about. It is recommended at the end of each dive and mandatory for deeper
dives.
Let us look at this safety rule in detail and
understand it so that we can be tension free.
DECOMPRESSION SICKNESS
We know while
diving that we do not have access to free air and have to depend on compressed
air. While breathing the compressed air underwater, nitrogen gets accumulated
in our blood. The nitrogen then gradually gets absorbed into the tissues as the
dive continues.
As we start to ascend, nitrogen starts getting
dispersed from the tissues as a result of decreasing pressure of air on the
tissue. However, ascending too fast will reduce the pressure very rapidly and nitrogen
will try to get washed quickly.
Therefore, there will be a greater pressure
differential which will cause nitrogen bubble formation in the tissues and
blood vessels.
These nitrogen bubbles trapped in our body will
result in Decompression Sickness.
THE STOP
Doing a safety stop is not tough. You simply have
to stop on the way up to the surface and stay at around 5 meters/15 feet for 3
minutes. If you find it difficult to maintain the same level, then use an
anchor- or bottom line to hold on to. If you do not have a line, you might find
it easier to stay at 6 meters/19 feet rather then 4-5 meters/ 15 feet. This is
due to the larger changes in the pressure at the lower depth. Remember to watch your depth gauge or dive computer to make sure you stay at the right depth, and
do not accidentally pop up to the
surface.
WHEN TO DO A SAFETY STOP
Although in shorter dives in shallow water we may
miss the safety stop, it is highly recommended for all dives. In that way we
will become accustomed to this simple safety rule.
However, when we go deeper, like 30 meters/100 feet
or more, we can not give it a miss. While engaging in this kind of diving, we
may need to be ready for an emergency safety stop depending on the situation. Remember
when you are doing a safety stop, it is important to maintain good buoyancy for
the entire span of the stop to avoid depth changes. After you have completed
the safety stop, you still need to rise slowly to the surface. While ascending,
always maintain a speed of no more than 18 meters/60 feet per minute. In any
case, for deep dives we cannot avoid safety stops. The safety stop is rather a decompression
stop which allows a more controlled off-gassing and helps immensely in avoiding
any discomfort. It keeps our dive as pleasant as desired by us. By now we
should all understand the extreme important of performing a safety stop. Right?
Therefore, remember to include this important act in your every dive and stay
safe.
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