Furuno FCR-2107 Series Operator's Manual page 132

5. AIS Operation
Note: AIS and Tracked Target viewing limitations are as follows:
•
AIS and Tracked Target are displayed on top of chart 1:1,000,001 for S57 charts.
•
AIS and Tracked Target are displayed on top of chart 1:1,900,001 for ARCS charts. This allows display
of AIS and Tracked Target on top of the largest scale ocean charts (original scale 1:3,500,000) when
they are zoomed to "overscale".
The left illustration shows the cal signs of targets and the right illustration shows the names of targets.
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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