Oceanic GEO 4.0, Operating Manual

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GEO 4.0 OPERATING MANUAL
© Pelagic, 2019 Doc. No. 12-5670-r01 (2/27/18)
COMPLICATIONS
The preceding information has described standard dive operations. Your new Geo 4.0 is also designed to help you to the surface in less than ideal
situations. The following is a description of these situations. Take some time to familiarize yourself with these operations before diving your Geo 4.0.
DECOMPRESSION
Decompression (deco) mode activates when theoretical No Decompression time and depth limits are exceeded. Upon entry into decompression, the
audible alarm will sound and the alarm LED will flash. The full Tissue Loading Bar Graph and Up Arrow icon will flash until the audible is silenced.
• Once within 10 ft (3m) below the required Stop Depth (stop zone), the Full Stop icon (both Arrows with Stop Bar) will be displayed solid.
To fulfill your decompression obligation, you should make a safe controlled ascent to a depth slightly deeper than, or equal to, the required stop
depth indicated and decompress for the stop time indicated. The amount of decompression credit time that you receive is dependent on Depth, with
slightly less credit given the deeper you are below the Stop Depth indicated. You should stay slightly deeper than the required Stop Depth indicated
until the next shallower Stop Depth appears. Then you can slowly ascend to that indicated Stop Depth but not shallower.
DECOMPRESSION ENTRY
Upon entry into decompression (deco) the audible alarm will sound and the alarm LED will flash until the audible is silenced. The up arrow and
full Tissue Loading Bar Graph icons will flash. Additionally, the stop depth, stop time, and the TAT (Total Ascent Time) values will be displayed. TAT
includes stop times at all required Decompression Stops plus vertical ascent time based on the max ascent rate allowed.
Total Ascent Time
0 - 999, then - - if
greater than 999 min
stop depth remaining stop
time (min)
up arrow
DECOMPRESSION STOP MAIN
Decompression (deco) Stop Main will display upon ascending to within 10 ft (3 m) below the Decompression Stop depth. The full stop graphic (op-
posed arrows with stop bar) will be displayed solid. While Decompression Stop Main is displayed, you may access up to 3 ALT displays by pressing
the ADV button to cycle through them. They are similar to the No Decompression Main, Dive ALT 1, and Dive ALT 2 displays, respectively.
full stop graphic
Total Ascent Time 0 - 999,
then - - if greater than 999
min
stop depth
remaining stop
time (min)
CONDITIONAL VIOLATION (CV)
Upon ascent above the required Decompression (deco) Stop depth, operation will enter Conditional Violation during which time no off gassing
credit will be given. The Audible alarm will sound and the alarm LED will flash. The full Tissue Loading Bar Graph and down arrow will flash until the
audible alarm is silenced, then the Tissue Loading Bar Graph will be solid.
• The down arrow continues to flash until descending below the required Stop Depth (within stop zone), then the full stop graphic (opposed arrows
with stop bar) will be on solid.
• If you descend deeper than the required Decompression Stop before 5 minutes elapse, Decompression operation will continue with no off gassing
credit given for time above the Stop. Instead, for each minute above the Stop 1½ minutes of penalty time will be added to the required Stop Time.
• The added penalty (decompression) time will have to be worked off before obtaining off gassing credit.
• Once the penalty time is worked off, and off gassing credit begins, required Decompression Stop Depths and Time will decrease toward zero. The
Tissue Loading Bar Graph will recede into the No Decompression zone, and operation will revert to No Decompression mode.
down arrow flashing
Tissue Loading
Bar Graph
flashing
missed
stop
depth
stop time (min)