SUUNTO D4i - Manual (Page 56)

5.9.1. Accessing DIVE mode
The Suunto D4i has three diving modes: AIR mode for diving with standard air only,
NITROX mode for diving with oxygen enriched mixtures, and FREE mode for freediving.
There is also a Dive OFF mode for use during other water activities, such as swimming
and surfing.
5.9.2. DIVE mode activation
Unless the DIVE mode is set OFF, the dive computer activates automatically when
submerged deeper than 0.5 m/1.5 ft. However, it is necessary to activate the DIVE
mode BEFORE diving to check the altitude and personal adjustment settings,
battery condition, oxygen settings, and so on.
After activation, all graphical display elements are turned ON, and the backlight and
the beep are activated. After this, the selected altitude and personal settings are dis-
played. A few seconds later the battery power indicator is shown, as well as the
maximum operating depth (MOD, 66.2 m), O
2
% (21%) and PO
2
(1.6) value. During a
dive series (between two consecutive dives) the dive computer also displayes the
current tissue saturation graph. A few seconds later the battery power indicator is
shown.
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