S-57 DATASETS ON UNSPECIFIED DATUM

Positions obtained from Global Navigation Satellite
Systems, such as GPS, are normally referred to
WGS84 Datum. The differences between
satellite-derived positions and positions on this cell
cannot be accurately determined; the estimated
value of the difference for this region of the chart is
shown in the INFORM attribute. Mariners are
warned that these differences MAY BE SIGNIFICANT
TO NAVIGATION and are therefore advised to
confirm GPS positions shown in the chart display
using alternative navigational techniques
particularly when closing the shore or navigating in
the vicinity of dangers.