CAUTION – QUALITY OF BATHYMETRIC DATA
The areas represented by the object M_QUAL (Quality of data) are approximate due 
to generalizing for clarity. Caution is advised, particularly for nearshore navigation 
or voyage planning. M_QUAL represents areas of uniform quality of bathymetric data. 
The CATZOC (Category of zone of confidence in data) attribute of M_QUAL provides 
an assessment of the overall zone of confidence.