Specifications

500AI

You should make every effort to complete all of your ascents with the

Nitrogen Bar Graph inside of the green zone.

If you inadvertently entered Decompression Mode, you must not com-

plete your ascent until the Nitrogen Bar Graph is at least inside the

yellow Caution Zone.

While you cannot provide a guarantee against the occurrence of de-

compression sickness, you may choose your own personal zone of

caution based upon your individual age, physique, excessive weight,

training, experience, etc. to reduce the statistical risk. By 'backing

off' on the bar graph (maintaining fewer segments), you can establish

and adjust your personal level of conservatism and margin of safety.

ASCENDING TOO FAST

The Ascent Rate Indicator shows how fast you are ascending. When you ex-

ceed the maximum recommended ascent rate of 60 feet (18 meters) per

minute, the bar graph will enter the red (Too Fast) zone (Fig. 46a), and you

will be alerted by the segments flashing. You will also be alerted by an Audible

Alarm (1 beep per second). The warnings will stop when your ascent rate is

slowed.

Fig. 46 - Ascent Too Fast

MAX

140

210

280

350

5000

4000

3000

2000

1000