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PRODIGY closely because you will enter decompression rapidly. Upon
entering decompression the TLBG will enter the red zone and the decompres-
sion dive icons will be displayed (Fig. 23).
EMERGENCY DECOMPRESSION
After entering decompression (especially at deeper depths) the TLBG
may fill the 10, 20, 30, and 40 FT (3, 6, 9, and 12 M) STOP decompression
zones rapidly. Once you’ve entered decompression, it is imperative that
you immediately begin an ascent at a safe rate of 60 feet (18 meters)
per minute or slower toward the required decompression ceiling. If
you continue to dive at a deeper depth, your exposure to decompres-
sion sickness will increase, and you risk entering a violation mode
and losing information needed to properly ascend.
Whether at 160 feet (48 meters) on a first dive, or 60 feet (18 meters) on a
third dive, it is possible to quickly enter decompression if you’re not careful.
Decompression is to be avoided because you cannot ascend directly to the
surface without potentially dire consequences. If your equipment failed,
requiring you to surface immediately, you would risk decompression sickness.
Your buddy would be unable to lend assistance without also risking decom-
pression sickness. Decompression diving requires special training and equip-
ment to be done properly. For these reasons, decompression sport diving
should be avoided.
Fig. 23 – Decompression
warning
®
FT
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