Specifications

57
500AI
DECOMPRESSION DIVE MODE
The 500AI is designed to help you by providing a complete representation of
how close you are to entering decompression. Decompression Dive Mode acti-
vates when theoretical no decompression time/depth limits are exceeded.
In the event that you enter Decompression Mode, as indicated by a double
beep and the large red segment of the Nitrogen Bar Graph and ceiling bar of
the Decompression Mode icon flashing, immediately begin a safe controlled as-
cent to a depth slightly deeper than, or equal to, the Required Ceiling Stop
Depth indicated (Fig. 63a) and decompress for the Stop Time indicated (Fig.
63b).
Other information appearing on the Main Display includes:
• current Depth (Fig. 63c)
• Total Ascent Time (Fig. 63d) - that includes stop times required at all
ceilings and vertical ascent time calculated at 60 ft (18 m) per minute.
• Breathing Gas Time Remaining and icon (Fig. 63e)
• O2 bar graph (if a nitrox dive), Ascent Rate Indicator, and Tank Pressure
bar graph
To activate he Backlight, press the Select (Right) button. The display will
remain illuminated for button depression time plus 3 seconds.
Fig. 63 - Decompression
Mode (Main Display)
c
FT
FT
0
70
140
210
280
350
5000
4000
3000
2000
1000
0
a
b
e
d