Furuno FCR-21X9 Operator's Manual page 8

TT/AIS
The TT/AIS box shows or hides the TT and AIS displays, and sets the CPA/TCPA alarm, the past position display, vector time and reference, etc.
Sets TT
acquisition
method; hides
TT display.
Disables, enables
the TT/AIS
CPA/TCPA alarm.
Set TT and AIS vector time.
Click to set association criteria (with arrow).
<: AIS symbol used for association target.
>: TT symbol used for association target.
No indication: Disable association.
Set CPA condition for TT
and AIS CPA/TCPA alarm.
Sets the conditions for automatic
activation of AIS targets
when their
CPA is
within the
CPA set.
Sets plot
interval for
TT and
AIS past
position
displays.
8
Shows, hides the
AIS display.
Sets reference for TT Sets TCPA condition for TT
and AIS target vectors. and AIS CPA/TCPA alarm.
Sets TT and AIS lost target
filter conditions.
AIS past position points.
Sets
reference
(true or
REL) for
TT and