5
When rising towards the surface, the “Variable Ascent Rate Indicator
™
”
(Fig. 3c) shows how fast you are ascending. The Variable Ascent Rate Indica-
tor (VARI) will alert you with a flashing display if you enter the red zone,
which represents ascent rates over 60 feet (18 meters) per minute. Immedi-
ately slow your ascent whenever this is seen.
If you have not entered decompression, a safety stop made between 15-20
feet (4.5-6 meters) is strongly recommended as a standard procedure before
completing your ascent. Many divers do this to provide a wider zone of
caution from the no-decompression limit. The TLBG gives a visual represen-
tation of just how close you are to the no-decompression limit with a yellow
“Caution Zone” (Fig. 3d). This Caution Zone portion of the TLBG allows you
to make a decision regarding safety stop duration or necessity. While you
cannot provide a guarantee against the occurrence of decompression sickness,
you may choose your own personal zone of caution based on age, physique,
excessive weight, etc., to reduce the statistical risk.
EMERGENCY DECOMPRESSION
If your depth or bottom time is such that the TLBG enters the red zone,
the PRODIGY will switch to the “Decompression Dive Mode” (Fig. 4) signi-
fied with the flashing Decompression Dive Identification Icon (Fig. 4a). A
decompression stop “ceiling” will be indicated by the TLBG (Fig. 4b), digital
display (Fig. 4c), and Stop Ceiling Icon (Fig. 4f). You must stay below the
Fig. 4 – Decompression
Dive Mode
a.
c.
e.
b.
d.
f.