Heat map overlay
The Heat map overlay feature shows a history of water temperature coloring on the chart. A
water temperature source is needed to provide the temperature data for the overlay (e.g. an
Echosounder transducer, a NMEA 2000 water temperature sensor, etc.).
The color range is adjusted automatically based on the minimum and maximum
temperatures recorded.
Select the color palette you want the system to use to show water temperatures. A legend is
shown on the panel that identifies the colors associated with the recorded temperatures.
Use the transparency option to set the transparency of the overlay on the chart.
Use the clear history option to delete all heat map data gathered up to the moment it is
selected. Heat map data is automatically deleted when the unit is turned off.
Insight and C-MAP charts
All possible menu options for Insight and C-MAP charts are described below. The features
and menu options available can vary depending on the charts you use. This section shows
menus from an Insight chart.
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Note: A menu option is greyed out if it is not available on the chart displayed. For
example, raster charts are not available with Insight, so the Raster charts menu option is
greyed out when Insight charts are displayed.
Insight and C-MAP tides and currents
The system can display Insight and C-MAP tides and currents. With this information it is
possible to predict the time, level, direction and strength of currents and tides. This is an
important tool when considering planning and navigation of a trip.
In large zoom ranges the tides and currents are displayed as a square icon including the
letter T (Tides) or C (Current). When you select one of the icons, tidal or current information
for that location are displayed.
Dynamic current data can be viewed by zooming inside a 1-nautical mile zoom range. At
that range, the Current icon changes to an animated dynamic icon that shows the speed and
direction of the current. Dynamic icons are colored in black (greater than 6 knots), red
(greater than 2 knots and less than or equal to 6 knots), yellow (greater than 1 knot and less
than or equal to 2 knots) or green (equal to or less than 1 knot), depending on the current in
that location.
If there is no current (0 knots) this will be shown as a white, square icon.
Static Current and Tide icons Dynamic Current icons
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Charts | NSO evo3 Operator Manual
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