Operation Manual

DECO

C.Z. C.Z.

PSI

NO DECO

WARNING: Existing data for making planned decompression

dives is extremely limited, and virtually nonexistent for repeti-

tive decompression diving. You must therefore avoid decom-

pression diving and allow a surface interval of at least 24 hours

before reentering the water in the event a dive requiring emer-

gency decompression is made.

If you're not careful, it is possible to enter decompression rapidly, whether at

deep depths or during repetitive dives.

Upon entering decompression, you must immediately change the focus of your

dive to getting safely back to the surface. Upon seeing the Tissue Loading Bar

Graph enter the red decompression (DECO) zone, you should immediately be-

gin a safe controlled ascent, 60 feet (18 meters) per minute or slower, to a

depth slightly deeper than or equal to the required ceiling stop depth indicated

(Fig. 86).

If you continue the dive at a depth more than a few feet (1 meter)

deeper than the required ceiling stop depth, your exposure to decom-

pression sickness will increase, and you will risk entering violation

mode and losing the information needed to ascend properly.

Fig. 86 - Decompression Stop