6.2.1 The presentation of charted information
that is issued by, or on the authority of a government authorized
hydrographic office, or other relevant government institution should
comply with the relevant IHO standards.
6.2.2 The presentation of proprietary charted
information should comply with relevant IHO standards, as far as practical.
There should be a clear indication when the presentation is not in
accordance with IHO standards.
6.2.3 The presentation of user-added charted information
should comply with the relevant IHO standards, as far as practical.
6.2.4 If chart data derived from different scales
appear on the display, the scale boundary should be clearly indicated.