Owner`s manual

NO DECO DIVE TIME REMAINING (NDC)

The ZEN constantly monitors No Decompression status.

NDC is the maximum amount of time that you can stay at your

present Depth before entering a Decompression situation. It is

calculated based on the amount of Nitrogen absorbed by hypo-

thetical tissue compartments.

The rates each of these compartments absorb and release

Nitrogen is mathematically modeled and compared against a

maximum allowable Nitrogen level.

Whichever one is closest to this maximum level is the controlling

compartment for that Depth. Its resulting value will be displayed

as NDC (Fig. 61a) and the NiBG (Fig. 61b).

As you ascend from Depth during a dive, the NiBG segments

will recede as control shifts to slower compartments.

This is a feature of the Decompression model that is the basis for

multilevel diving, one of the most important advantages that the

ZEN dive computer offers.

Fig. 61 - NDC (DTR)