CATZOC ll Category of Zone of Confidence ll ENC ll ECDIS ll UKC ll Passage Planning ll Navigation

How to calculate UKC? https://youtu.be/z2mtGFXi-F0

This video explains CATZOC (Category of Zone of Confidence). It shows how to determine the zone of confidence value to find the actual depth of the water from the stated charted depth in the ENC. It also shows how to activate the layer of accuracy using a JRC ECDIS.

CATZOC stands for Category of Zone of Confidence. It describes the level of confidence or accuracy of hydrographic survey data used in nautical charts. It refers to the quality and accuracy of survey data and the applicable error in the chart datum.
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