SUUNTO SPYDER User Manual

Page 46

WARNING!

YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY

THE SPYDER. The ascent time will increase if you:

remain at depth

ascend slower than 10 m/min [33 ft/min], or

make your decompression stop deeper than at the ceiling.

These factors will also increase the amount of air required to reach the surface.

WARNING!

NEVER ASCEND ABOVE THE CEILING! You must not ascend above the ceil-

ing. In order to avoid doing so by accident, you should stay slightly below the

ceiling.

Ceiling and Ceiling Zone
When in decompression, it is important that you understand the meaning of ceiling

and ceiling zone:
The ceiling is the shallowest depth to which you should ascend when in decom-

pression. At this depth, or below, you must perform one or several decompres-

sion stops. All decompression stops must be performed at or below the ceiling

depth.

The ceiling zone is the optimum decompression stop zone. It is the zone be-

tween the minimum ceiling and 1.8 m [6 ft] below the minimum ceiling.

The depth of the ceiling will depend on your dive profile. It will be fairly shallow

when you enter the Decompression Mode, but if you remain at depth, the ceiling