Furuno FCR-2107 Operator's Manual page 126

5. AIS Operation
The left illustration shows AIS targets with "Outlines" and the right illustration shows AIS targets with "point
symbols". Note that your ship and AIS targets are displayed as true scale symbol if the displayed chart scale is larger
than set with "Ship true symbol scale" limit on the Tracking page in the Chart Display dialog box and if the size of
the true scale symbol is larger than 6 mm on the chart display.
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