Furuno FEA-2807 Operator's Manual page 199

9. Raster Chart Material
Targets page
Symbol Display
Color: Select color of target from the list box.
TT: Select size of tracked target symbols to Std or Small.
AIS: ROT (º/min), limit to display AIS target with curved speed vector.
Note: Source of ROT must be ROT gyro on target vessel.
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