Furuno FAR-2218, Operator'S Manual, Page: 171 / 294

3. TARGET TRACKING (TT)
3-31
3.18 TT System Messages
There are four main reasons the TT may trigger the audio and visual alerts:
You can acknowledge visual alerts and silence the audio alerts with one of the follow-
ing methods:
• Press the ALARM ACK key on the control unit
• Click the [ALERT] box, at the bottom-right of the screen.
• Click the alert in the [ALERT LIST].
• Collision alarm
• Acquisition zone alert • Lost target alert
• Target capacity
Alert message Priority Meaning Action required
TT DANGER OF
COLLISION Alarm A tracked target is on collision
course with your vessel. Take evasive action or termi-
nate tracking of TT.
TT NEW
TARGET Warning Tracked target has entered an ac-
quisition zone. The tracked tar-
get's symbol is red and flashing. Confirm the tracked target, then
press the
ALARM ACK key.
TT TARGET
LOST Warning When the system detects a loss of
a tracked target, the lost tracked
target symbol appears in red and
flashes. At the same time, an au-
dio alert is produced for one sec-
ond. The lost target mark
disappears from the screen after
the lost target alert is acknowl-
edged. Confirm the lost target, reac-
quire if necessary.
REF TARGET
LOST Warning When the system detects a loss of
a reference target, the target sym-
bol turns red and flashes. At the
same time, an audio alert is pro-
duced for one second. The refer-
ence target mark disappears from
the screen after the reference tar-
get alarm is acknowledged. To continue using a referenced
target for speed input, select an-
other tracked target.
TT TARGET
FULL (AUTO) or
(MAN) Warning Appears when capacity for auto-
matically (manually) acquired tar-
gets is full. To continue acquiring targets,
cancel tracking for unnecessary
targets.
TT TARGET 95%
(AUTO) or (MAN) Caution Appears when capacity for auto-
matically (manually) tracked tar-
gets is 95% full.