Aqua Lung i550C, Owner'S Manual

Page: 38 / 59

Doc. 12-7909-r04 (10/31/18)
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DIVE OPERATION
© Aqua Lung International, Inc. (2018)
The preceding information has described stress free casual dive operations. Your new i550C is also designed
to help you to the surface in less than ideal situations. The following is a description of these. Take some time to
familiarize yourself with these operations before diving your i550C.
DECOMPRESSION
Decompression 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 N2 bar Graph and
Up Arrow icon will flash until the audible alarm is silenced.
> Once within 3 m (10 ft) 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 decom-
pression credit time that you receive is dependent on Depth, with slightly less credit given the deeper you are be-
low 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, but not shallower than that indicated Stop Depth.
COMPLICATIONS
DECOMPRESSION ENTRY
Upon entry into decompression the audible alarm will sound and the alarm LED will flash until the audible alarm
is silenced. The message UP, Up Arrow, and full N2 Bar Graph icons will flash. Additionally, the stop depth, stop
time, and the TTS (Time To Surface) values will be displayed. TTS includes stop times at all required Decompres-
sion Stops plus vertical ascent time based on the max rate allowed.
TTS 0 - 99, then - - if
greater than 99 min
stop depth
stop time
DECOMPRESSION STOP MAIN
Decompression Stop Main will display upon ascending to within 3 m (10 ft) below the Decompression Stop depth.
The STOP icon, the Full Stop icon (both 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.
TTS 0 - 99, then - - if
greater than 99 min
stop depth
stop time