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OCi OPERATING MANUAL
© 2002 Design, 2013 Doc. No. 12-5335-r01 (6/27/13)
DUAL ALGORITHM®
The OCi is configured 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 Mode and DTR (Dive Time Remaining) for NORM dives.
You can select DSAT or Z+ prior to new dives. Also, the selection can be changed after dives once Desaaturation Time decreases to 0:00, otherwise the
selection will lock in for 24 hours after the last dive.
DSAT was the original standard used by Oceanic in all of its dive computers until the dual function was implemented several 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 Decompression dives
which are considered more risky than general No Deco dives.
Z+ (the Pelagic Z+ algorithm) performance is based on Buhlmann ZHL-16c. It features NDLs that are considerably more conservative than the DSAT ver-
sion especially at shallower depths.
To create even greater margins of safety with respect to decompression, a Conservative Factor as well as Deep and Safety Stops are available and can be
activated for NORM No Deco dives.
CONSERVATIVE FACTOR (CF)
When the Conservative Factor is set On, the NDLs (No Deco Limits), 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. See tables in back.
DEEP STOP
When the Deep Stop 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 Deep Stop, you will be able to access a Deep Stop Preview screen that will display the current calculated
Deep Stop Depth and a fixed Stop Time (of 2 minutes) for 10 seconds then revert to the Main.
Upon initial ascent to within 10 FT (3 M) below the calculated Stop Depth, a Deep Stop screen displaying a Stop Depth equal to 1/2 the Max Depth will
appear with a timer that counts down from 2:00 to 0:00 (min:sec).
> 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 screen 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 Deco, exceed 190 FT (57 M), or a high O2 warning condition occurs (=> 80%), the Deep Stop feature will be disabled for
the remainder of that dive.
> The Deep Stop function is disabled while a high PO2 alarm condition is present (while => set point for the gas in use).
SAFETY STOP
If set ON:
Upon ascent to within 5 FT (1.5 M) deeper than the Safety Stop 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 Safety Stop at the Depth set will be displayed with a countdown beginning at the Safety Stop Time set and counting
down to 0:00 (min:sec).
• If the Safety Stop was set for OFF or TMR (Timer), the Safety Stop screen 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 Safety Stop screen 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 Safety Stop screen will appear
again upon ascent to within 5 FT (1.5 M) deeper than the Safety Stop Depth set for 1 second.
• If you surface prior to completing it, the Safety Stop will be canceled for the remainder of that dive.
• There is no Penalty if you surface prior to completing the Safety Stop or ignore it.
If set for TMR (Timer):
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 screen will appear displaying 0:00 (min:sec) until started.
• If the Safety Stop was set for OFF or ON, the Timer screen will not appear.
• If you descend deeper than 30 FT (9 M) for 10 seconds, the No Deco Main will replace the Safety Stop 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 Safety Stop Timer is active,
the Timer will be disabled for the remainder of that dive.
• If you surface, the Safety Stop will be canceled for the remainder of that dive.
• There is no Penalty if you surface prior to completing the Safety Stop or ignore it.