Specifications

500AI

When the Breathing Gas Time Remaining decreases to zero minutes, the Au-

dible Alarm will continuously beep once per second* (Fig. 66), signaling the

need for an immediate safe ascent to your first decompression stop.

*If the Audible Alarm feature was set to OFF prior to the dive, only a

double beep will be emitted to alert you.

There is no need to panic. The 500AI has allowed for (calculated) the breath-

ing gas you will consume while making a safe controlled ascent, including that

required for decompression stops, and still provide the surfacing tank pressure

reserve you chose (set) as the End Pressure Alarm Set Point.

MANAGING DECOMPRESSION STOPS

The amount of decompression credit time that you receive is dependent on

depth, with slightly less credit given the deeper you are.

You should stay slightly deeper (Fig. 67a) than the Required Stop Depth indi-

cated (Fig. 67b) until the next shallower Stop Depth appears. Then, you can

slowly ascend to, but not shallower than, that indicated ceiling Stop Depth.

Once all required decompression has been completed, the 500AI will revert to

the No Decompression Dive Mode. This is indicated by Total Ascent Time =

0:00, and the Nitrogen Bar Graph receding into the Caution Zone.

Fig. 66 - Gas Time Remain-

ing (zero minutes)

Fig. 67 - Managing a Stop

140

210

280

350

5000

4000

3000

2000

1000

140

210

280

350

5000

4000

3000

2000

1000