Furuno FAR-2218 Operator's Manual page 196

4. AIS OPERATION
When the association criteria (gap, range, bearing, speed, and course) is met, and the
ASSOCIATION TARGET setting is [AIS], the TT symbol is erased and only the AIS
symbol is displayed.
All default association settings are restored whenever the power is turned on.
To show the association information, place the cursor on the target data box at the
right side of the screen, then press the ACQ key. The selected target's AIS and TT
data are displayed together as shown in the examples below.
4-20
Combined TT/AIS data
for a CLASS A vessel
Combined TT/AIS data
for a CLASS B vessel