Furuno USA Inc 9ZWRTR090 ユーザーズマニュアル
Chapter 4: ARPA Operation
4-3
4.4 Cancelling Tracking of Targets
ARPA targets can be cancelled individually or collectively as shown below. All targets
can also be cancelled from the Radar pop-up menu.
can also be cancelled from the Radar pop-up menu.
1. For cancelling individual target, use the Cursorpad to put the cursor on the tar-
get you want to cancel tracking.
2. Long-push the Rotary Knob.
3. Select the Targets ROTOkey and push the Rotary Knob.
4. Select the Cancel or Cancel All ROTOkey as applicable and push the Rotary
3. Select the Targets ROTOkey and push the Rotary Knob.
4. Select the Cancel or Cancel All ROTOkey as applicable and push the Rotary
Knob.
Tracking is cancelled and targets are erased from the screen.
4.5 CPA/TCPA Alarm
The CPA/TCPA alarm is useful for alerting to possible collision situations. With the
alarm active, the ARPA continuously monitors the predicted range at the Closest Point
of Approach (CPA) and predicted time to CPA (TCPA) of each tracked target to own
ship. When the predicted CPA of any target becomes smaller than a preset CPA alarm
range and its predicted TCPA less than a preset TCPA alarm limit, the buzzer sounds
and an appropriate text message appears. In addition, the ARPA symbol changes to
a triangle and flashes together with its vector.
alarm active, the ARPA continuously monitors the predicted range at the Closest Point
of Approach (CPA) and predicted time to CPA (TCPA) of each tracked target to own
ship. When the predicted CPA of any target becomes smaller than a preset CPA alarm
range and its predicted TCPA less than a preset TCPA alarm limit, the buzzer sounds
and an appropriate text message appears. In addition, the ARPA symbol changes to
a triangle and flashes together with its vector.
Provided that this feature is used correctly, it will help prevent the risk of collision by
alerting you to threatening targets. However, it is important that gain, sea and rain con-
trols are properly adjusted.
alerting you to threatening targets. However, it is important that gain, sea and rain con-
trols are properly adjusted.
CPA/TCPA alarm ranges must be set up properly taking into consideration the size,
tonnage, speed, turning performance and other characteristics of own ship.
tonnage, speed, turning performance and other characteristics of own ship.
Setting the CPA/TCPA Alarm
1. Press the MENU key to open the menu.
2. Select the Radar sub menu.
3. Select CPA/TCPA Alarm.
4. Push the Rotary Knob to show the status box in green to activate the CPA/TCPA
2. Select the Radar sub menu.
3. Select CPA/TCPA Alarm.
4. Push the Rotary Knob to show the status box in green to activate the CPA/TCPA
alarm.
5. Set CPA and TPCA values at CPA Alarm Value and TCPA Alarm Value.
6. Press the MENU key to close the menu.
6. Press the MENU key to close the menu.
Acknowledging the CPA/TCPA Alarm
The CPA/TCPA alarm sounds when the CPA and/or TCPA of an ARPA target is within
the CPA/TCPA alarm range. To acknowledge and silence the CPA/TCPA alarm,
press the CANCEL key. The audio alarm is silenced and the symbol stops flashing.
the CPA/TCPA alarm range. To acknowledge and silence the CPA/TCPA alarm,
press the CANCEL key. The audio alarm is silenced and the symbol stops flashing.
Disabling the CPA/TCPA Alarm
Show the status box of CPA/TCPA Alarm in gray to disable the alarm. (See "Setting
the CPA/TCPA Alarm" above for the procedure.)
the CPA/TCPA Alarm" above for the procedure.)