Aqua Lung i450T, Owner'S Manual

Page: 46 / 86

Doc. 12-7834-r04 (2/16/16)
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DIVE OPERATION
© Aqua Lung International, Inc. (2015)
The preceding information has described standard dive operations. Your new i450T 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 i450T.
DECOMPRESSION
Decompression (deco) mode activates when theoretical No Decompression time and depth limits are exceeded.
Upon entry into deco, the audible alarm will sound and the alarm LED will flash. The full N2 bar Graph and Up Ar -
row icon will flash until the audible is silenced.
• Once within 10 FT (3 M) 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
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 message DECO, up arrows, 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 Deco
Stops plus vertical ascent time based on the max ascent rate allowed.
COMPLICATIONS
TTS 0 - 99, then - - if
greater than 99 min
stop depth
remaining stop
time (min)
DECOMPRESSION STOP MAIN
Decompression (deco) Stop Main will display upon ascending to within 10 ft (3 m) below the Deco Stop depth.
The message DECO STOP, the full stop graphic (opposed arrows with stop bar) will be displayed solid. While
Deco 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 Deco Main, Dive ALT 1, and Dive ALT 2 displays, respectively.
full stop graphic
TTS 0 - 99, then - - if
greater than 99 min
stop depth
remaining stop
time (min)
up arrow