Tides
Provides information on tidal streams derived both from data bases and a comparison (within the system) of course and speed over ground (from GPS) with heading and boat speed (from boat instruments).
Tidal flows are shown on the chart as at present time or at any selected time over the next 30 days. There is an option enabling changes in tidal flows to be viewed in animated form.
This image (below) shows the almanac data derived from a C-Map chart
