Proposals on chart quality portrayal

The objective of the IHO Data Quality Working Group is stated as "To develop appropriate methods of classifying and depicting the quality of digital hydrographic data." and more specifically to “Investigate ways of ensuring that ECDIS displays provide a clear warning or indication to the mariner on the quality of the underlying survey data, through appropriate use of the attribute CATZOC and/or improvement of the existing display capabilities” [DQWG TOR].