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Articles

Volume 5, Number 3 (2004)

'ZOCman Cometh' or 'On the Application of Cateqory of Zone of Confidence in the Australian Hydrographic Service'

Submitted
August 13, 2013
Published
2004-12-12

Abstract

In 1997 Zone o f Confidence (ZOC) was Included in the ENC Product Specification in I HO S-57. ZOC was developed by the I HO Data Quality Working Group as a practical solution for the assessment and display of hydrographic data quality to support safe and efficient navigation. Despite adoption by the IHO, Australia is the only country that employs ZOC in paper charts, and one of the few using ZOC comprehensively in ENC. This paper will: - provide a brief history o f ZOC development - explain the standard - describe AHS implementation - outline issues identified since ZOC were developed.