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A300/A300 XT OPERATING MANUAL
© 2002 Design, 2012 Doc. No. 12-7255-r01 (5/14/12)
FREE SURFACE MODE
FREE dives, which are allowed prior to NORM, TECH, or GAUG dives as well as after NORM or TECH dives, calculate Ni-O2
based upon the NORM/TECH Algorithm selected and a fixed default FO2 of Air. FO2 settings for NORM/TECH dives do not
affect calculations for FREE Dives.
FREE mode displays NDC Time (on a dive ALT screen) and the TLBG on surface and dive Main screens, and includes a TLBG
Alarm that activates when it enters the Caution zone (14 segments).
In the event of entry into Deco during operation in FREE mode, operation reverts to VGM for 24 hours.
FREE dive alarms are set, controlled, and operate separately from NORM/TECH/GAUG Alarms.
The SURF MAIN screen remain on display for 10 minutes during which time the unit will enter Dive Mode upon descent to 5 FT
(1.5 M) for 5 seconds.
The unit enters post dive Surface Mode upon ascent to 2 FT (0.6 M) for 1 second and displays the Surface Main with the Surface
Mode (clock/wave) icon flashing.
Access to Surface ALT screens is allowed during the first 10 minute with access to other surface modes/screens blocked until 10
minutes elapse.
Exception is for Violations.
When the 10 minute post dive surface Interval time has elapsed, access to other Surface modes/screens is allowed.
FREE SURFACE SEQUENCE
Sequence >> SURF MAIN >> ALT 1 > ALT 2 > FLY/DESAT > SET > ID.
A (< 2 sec) to step forward through the Surface sequence.
A (hold) to scroll forward through the Surface sequence (4/sec).
M (< 2 sec) to step back through the Surface sequence.
S (< 2 sec) to access selections.
S (2 sec) to step back from a selection to the previous selection or sequence item.
M (2 sec), or if no button is pressed during a period of 2 minutes, to revert to SURF MAIN.
S (press) to activate the Smartglo Backlight.
FREE SURF MAIN, information includes (Fig. 103A/B) -
> Surface Interval Time (min:sec) with clock/wave icon.
> Dive number with # icon, 0 if no dive yet, and graphic FRE, or -
graphic CD and countdown Time (min:sec) with clock icon, if the CDT is selected to be displayed.
> Battery icon, if a Low Battery condition exists.
> TLBG with icon, if any after NORM, TECH, or FREE dives.
A (< 2 sec) to access CDT Status, if the CDT is not on the Main; or ALT 1, if the CDT is on the Main; then step forward
through the Surface sequence.
A (hold) to scroll forward through the Surface sequence at 4/sec.
M (< 2 sec) to access ID-SN, then step back through the Surface sequence.
S (< 2 sec) to Start/Stop the CDT, if on the Main.
No action if the CDT is 0:00 or it is not on the Main.
S (2 sec) to Reset the CDT (to the time previously set), if on the Main and stopped or 0:00.
No action if the CDT is running
or it is not on the Main.
S (press) to activate the Smartglo Backlight.
CDT STATUS (no screen if on Main), information includes (Fig. 104) -
> Graphic REDY (means the CDT is set & is ready to start), blank if 0:00 (not set or has counted down).
> Graphic CD and CD Time (min:sec) with clock icon.
S (< 2 sec) to Start/Stop the CDT
. No action if the CDT is 0:00.
S (2 sec) to Reset the CDT (to the time previously set) if stopped or 0:00.
No action if the CDT is running.
A (< 2 sec) to access Surface ALT 1, then step forward through the Surface sequence.
M (< 2 sec) to step back to Surface Main.
10 sec, revert to Surface Main if no button is pressed.
FREE SURF ALT 1, information includes (Fig. 105) -
> Max Depth* with FT (or M) and MAX icons.
> Elapsed Dive Time* (min:sec) with wave/clock icon.
> LAST icon, indicating that data is from the dive previously conducted.
*Dashes if no previous dive.
A (< 2 sec) to step forward to ALT 2.
M (< 2 sec) to step back to Main.
10 sec, or M (2 sec), revert to Main.
S (press) to activate Backlight.
Fig. 103A - FREE SURF MAIN
(default, without CDT)
Fig. 103B - FREE SURF MAIN
(CDT selected)
Fig. 104 - FREE CDT STATUS
(set, ready to start)
Fig. 105 - FREE SURF ALT 1
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