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OCL OPERATING MANUAL
© 2002 Design, 2014 Doc. No. 12-5378-r01 (4/9/15)
BAR GRAPHS
The OCL features 2 specic bar graphs.
> The one on the left represents nitrogen loading. It is referred to as the TLBG (Tissue Loading Bar Graph).
> The one on the right represents ascent rate. It is referred to as the VARI (Variable Ascent Rate Indicator).
TLBG (NORM/FREE)
The TLBG represents your relative No Deco (Fig. 60a) or Deco status (Fig. 61a). The rst 4 segments represent No Deco
status and the fth indicates a Deco condition.
As your Depth and Elapsed Dive Time increase segments add.
As you ascend segments recede, indicating that additional no deco time is available.
The OCL monitors 12 different nitrogen compartments simultaneously and the TLBG displays the one that is in control of
your dive at any given time.
VARI (NORM/GAUG)
The VARI (Fig. 63a) provides a visual representation of ascent speed (i.e., an ascent speedometer).
The segments represent two sets of speeds which change at a reference depth of 60 FT (18 M). Refer to the chart.
When ascent is too fast, the audible will sound, and all VARI segments will ash (Fig. 63) until ascent is slowed.
WARNING: When deeper than 60 FT (18 M), ascent rates should not exceed 60 FPM (18 MPM). At depths
of 60 FT (18 M) and shallower, ascent rates should not exceed 30 FPM (9 MPM).
ALGORITHM
The OCL is congured with 2 algorithms which allows you to choose which set of NDLs (No Deco Limits) will be used for
nitrogen/oxygen calculations and displays relating to Plan and DTR (Dive Time Remaining).
You can select to use either the DSAT or the PZ+. After dives, the selection can be changed once Desaturation time de-
creases to 0:00 or 24 hours pass without a dive.
DSAT was the standard used by Oceanic in all of its dive computers until it adopted the Dual Algorithm function sev-
eral years ago. It features NDLs that are based on exposures and test data which also formed validation for the PADI
RDP. It imposes restrictions for repetitive Deco dives considered more risky.
PZ+ (Pelagic Z+) performance is based on Buhlmann ZHL-16c. It features NDLs that are considerably more conserva-
tive especially at shallower depths.
To create even greater margins of safety with respect to decompression, a Conservative Factor as well as No Deco Deep
and Safety Stops can be included for No Deco dives.
CONSERVATIVE FACTOR (CF)
When the Conservative Factor is set On, the No Deco Limits which are based on the algorithm selected and used for Ni-O2
calculations and displays relating to Plan and Dive Time Remaining, will be reduced to the values available at the altitude
level that is 3,000 feet (915 meters) higher. Refer to the charts in the back of this manual for times.
DEEP STOP (DS), No Deco only
When the Deep Stop selection is set On, it will trigger during NORM No Deco dives when you descend to 80 FT (24 M),
then calculate (and continually update) a Stop Depth equal to 1/2 the Max Depth.
While 10 FT (3 M) deeper than the calculated Deep Stop, you will be able to access a Deep Stop Preview screen that will
display the current Stop Depth/Time.
Upon initial ascent to within 10 FT (3 M) below the calculated Stop Depth, a Deep Stop screen displaying a Stop Depth at
1/2 the Max Depth will appear with a Countdown Timer beginning at 2:00 (min:sec) and counting down to 0:00.
> If you descend 10 FT (3 M) below, or ascend 10 FT (3 M) above, the calculated Stop Depth for 10 seconds during the
countdown, the No Deco Main will replace the Deep Stop Main display and the Deep Stop feature will be disabled
for the remainder of that dive. There is no Penalty if the Deep Stop is ignored.
> In the event that you enter Decompression, exceed 190 FT (57 M), or a High O2 condition (=> 80%) occurs, the Deep
Stop will be disabled for the remainder of that dive.
> The Deep Stop is disabled during a High PO2 Alarm condition (=> Set Point).
Fig. 60 - NO DECO MAIN
Fig. 61 - DECO MAIN
a
a
Fig. 62 - DIVE MAIN
(Ascent normal)
Fig. 63 - DIVE MAIN
(Ascent Too Fast)
a
Deeper than 60 FT (18 M)
VARI Ascent Rate
Segments FPM MPM
0 0 - 20 0 - 6
1 21 - 30 6.1 - 9
2 31 - 40 9.1 - 12
3 41 - 50 12.1 - 15
4 51 - 60 15.1 - 18
5 60 + 18 +
60 FT (18 M) & Shallower
VARI Ascent Rate
Segments FPM MPM
0 0 - 10 0 - 3
1 11 - 15 3.1 - 4.5
2 16 - 20 4.6 - 6
3 21 - 25 6.1 - 7.5
4 26 - 30 7.6 - 9
5 30 + 9 +