DIVE
TABLE AND DIVE KOMPUTER
Decompression
diving means that the divers absorb
so much nitrogen (or other gas) during
a dive that it's not possible to ascend
directly surface without a substantial
risk of DCS. Instead, diver makes a
series of stops, each progressively
longer, to allow sufficient time for
the body to release dissolved nitrogen.
Decompression.
diving usually calls for using special
synthetic breathing gases, requires
a good deal of surface support. and
even when done proper. compared to recreational
diving the diver has more risk from
DCS and other hazards. Obviously, this
type of during is beyond the scope of
the course an : recreational diving,
though you'll learn - procedures for
making emergency decompression stops
in the unlikely event you accidentally
exceed a no decompression limit.
Dive
tables have been around since 1907,
and until the late 1980 where primary
method for planning dive. Although you'll
probably end up using a dive computer
for most of 'your diving tables still
have their place for two primary reasons.
For one, understanding how to plan dives
with table gives a "feel"
for what your computer does - it gives
you a sense (a precise time) of how
long a computer will let you stay at
a given depth.
Second,
being electronic, dive computers can
malfunction on you due to battery failure,
impact. baking in sunlight, you name
it Dive tables, being primarily printed
plastic, are much less likely to file
unless your dog chews them up or something.
So you'll want to have them along as
back up - if your computer crashes on
a dive trip. (I tables may mean the
difference between being in the water,
or sitting at the dock in a very foul
mood.
Until
1988, the dive tables recreational divers
used were really hand-me-downs from
commercial and military diving. Although
they adequate for planning recreational
dives, they were tables for decompression
diving and had to accommodate large
amounts of theoretical nitrogen, and
consequently "penalized" recreational
divers, who by making no decompression
dives, had far less theoretical nitrogen.
Further more, these tables were tested
on predominantly young, male military
divers, which didn't fully represent
the population spectrum you find in
recreational diving.
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