The OCS is configured with 2 algorithms which allows you to choose which set of NDLs (No Deco Limits) will be used for Ni/O2 calculations and displays
relating to Plan and DTR (Dive Time Remaining).
You can select DSAT or Z+. The selection will lock in for 24 hours after the last dive.
DSAT has been the standard used by Oceanic in all of its dive computers until this time. 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.
Z+ (Pelagic Z+) performance is based on Buhlmann ZHL-16c. It features NDLs that are considerably more conservative 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 CF is set On, the NDLs which are based on the algorithm selected and used for Ni/O2 calculations and displays relating to Plan and DTR, will
be reduced to the values available at the altitude level that is 3,000 feet (915 meters) higher.
DEEP STOP (DS)
When the DS selection is set On, it will trigger during NORM No Deco dives when you descend to 80 FT (24 M) and calculate (and continually update) a
Stop Depth equal to 1/2 the Max Depth.
While 10 FT (3 M) deeper than the calculated DS, you will be able to access a DS Preview screen that will display the current DS Stop Depth/Time (fixed
at 2 min) for 5 seconds then return to the Main.
Upon initial ascent to within 10 FT (3 M) below the calculated Stop Depth, a DS 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 DS Main display and the DS feature will be disabled for the remainder of that dive. There is no Penalty if the DS is ignored.
> In the event that you enter Deco, exceed 190 FT (57 M), or a High O2 condition (=> 80%) occurs, the DS will be disabled for the remainder of that
dive.
> The DS is disabled during a High PO2 Alarm condition (while => Set Point).
SAFETY STOP (SS)
If set On:
Upon ascent to within 5 FT (1.5 M) deeper than the SS Depth set for 1 second on a No Deco dive in which Depth exceeded 30 FT (9 M) for 1 second, the
audible will sound and a SS at the Depth set will be displayed with a countdown beginning at the SS Time set and counting down to 0:00 (min:sec).
• If the SS was set for OFF or Timer On, the display will not appear.
• In the event that you descend 10 FT (3 M) deeper than the Stop Depth for 10 seconds during the countdown, or the countdown reaches 0:00, the No
Deco Main will replace the SS Main which will reappear upon ascent to within 5 FT (1.5 M) deeper than the Safety Stop Depth set for 1 second.
• In the event that you enter Deco during the dive, complete the Deco obligation, then descend below 30 FT (9 M); the SS Main will appear again upon
ascent to within 5 FT (1.5 M) deeper than the SS Depth set for 1 second.
• If you surface prior to completing it, the SS will be canceled for the remainder of that dive.
• There is no Penalty if you surface prior to completing the SS or ignore it.
If set for Timer On:
Upon ascending to 20 FT (6 M) for 1 second on a No Deco dive in which Depth exceeded 30 FT (9 M) for 1 second, the audible will sound and a Run
Timer will appear displaying 0:00 (min:sec) until started.
• If the SS was set for Off or On, the Timer display will not appear.
• If you descend deeper than 30 FT (9 M) for 10 seconds, the No Deco Main will replace the SS Timer screen which will reappear upon ascent to 20 FT
(6 M) for 1 second.
• If you ascend above 10 FT (3 M) for 10 seconds, or enter Deco, or a High O2 alarm condition occurs (100%), while the SS Timer is active, the SS
Timer will be disabled for the remainder of that dive.
• If you surface prior to completing it, the SS will be canceled for the remainder of that dive.
• There is no Penalty if you surface prior to completing the SS or ignore it.
OVERVIEW OF FO2 SETTINGS AND 50% DEFAULT
Refer to page 20 for Set F (FO2) items. For each numeric value of FO2 displayed on set screens, the MOD (Max Operating Depth) that can be achieved
with the PO2 Alarm set will be displayed.
FO2 50% Default (only for NORM Nitrox Dives)
When the FO2 50% Default is set On and FO2 Gas 1 is set for a numerical value, 10 minutes on the surface after that dive the FO2 Gas 1 will be dis-
played as 50 and further dives will be calculated based on 50% O2 for oxygen calculations and 21% O2 for Nitrogen calculations (79% Nitrogen) unless
FO2 Gas 1 is set before the dive.
FO2 Gas 1 will continue to reset to the FO2 50% Default after subsequent repetitive dives until 24 hours elapse after the last dive, or the FO2 50% Default
is set Off.
When the FO2 50% Default is set Off, the OCS will remain set at the last FO2 Gas 1 Set Point for that period of activation.
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