Lowrance 5 HDI Operator's Manual page 29

Navionics specific chart options
Chart overlay, orientation, and look ahead options (previously
described in this section) are common to both C-MAP and
Navionics charts. The following describe Navionics specific chart
options.
Community edits
Toggles on the chart layer including Navionics edits. These are user
information or edits uploaded to Navionics Community by users,
and made available in Navionics charts.
For more information, refer to Navionics information included with
your chart, or to Navionics website: www.navionics.com.
SonarChart Live
SonarChart Live is a real-time feature where the device creates an
overlay of depth contours based on your own live sonar soundings.
In the Navionics chart menu, select Overlay and then SonarChart
Live to display it as an overlay on the chart.
When you select SonarChart Live overlay the menu expands to
display SonarChart Live Options. Use the options to set the
transparency and minimum depth.
Transparency
The SonarChart Live overlay is drawn on top of other chart data. The
chart data is completely covered at minimum transparency. Adjust
the transparency to allow the chart details to be seen.
Minimum depth
Adjusts what SonarChart Live rendering treats as the safety depth.
This affects the coloring of the SonarChart Live area. As the vessel
approaches the safety depth, the SonarChart Live area will gradually
change from a simple grey/white to red.
Navionics dynamic tide and current icons
Shows tides and currents with a gauge and an arrow instead of the
diamond icons used for static tides and current information.
The tide and current data available in Navionics charts are related to
a specific date and time. The system animates the arrows and/or
gauges to show the tides and currents evolution over time.
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Charts | Hook² Series Operator Manual