Furuno USA Inc 9ZWRTR094 ユーザーズマニュアル
Chapter 4: ARPA Operation
4-2
4.1 Enabling, Disabling ARPA
1. On the Chart Plotter or Radar display, long-push the Rotary Knob.
2. Select the Targets ROTOkey and push the Rotary Knob.
3. Select the ARPA ROTOkey.
4. Push the Rotary Knob to alternately enable and disable the ARPA display.
2. Select the Targets ROTOkey and push the Rotary Knob.
3. Select the ARPA ROTOkey.
4. Push the Rotary Knob to alternately enable and disable the ARPA display.
4.2 Manually Acquiring a Target
1. Use the Cursorpad to put the cursor on the target you want to acquire.
2. Press the right-button key to show the Radar pop-up menu.
3. Select Acquire Target and push the Rotary Knob.
2. Press the right-button key to show the Radar pop-up menu.
3. Select Acquire Target and push the Rotary Knob.
A target just acquired is marked with a broken square and a vector appears within 20
scans of the antenna to indicate the target's motion trend. Within 60 scans, the initial
tracking stage is finished and the target becomes ready for stable tracking. At this
point, the broken square mark changes to a solid circle. (Targets automatically ac-
quired are distinguished from those acquired manually. The targets which are ac-
quired manually are displayed by bold symbol.)
scans of the antenna to indicate the target's motion trend. Within 60 scans, the initial
tracking stage is finished and the target becomes ready for stable tracking. At this
point, the broken square mark changes to a solid circle. (Targets automatically ac-
quired are distinguished from those acquired manually. The targets which are ac-
quired manually are displayed by bold symbol.)
Note 1: For successful acquisition, the target to be acquired should be within 0.2 to
32 nm from own ship and not obscured by sea or rain clutter.
32 nm from own ship and not obscured by sea or rain clutter.
Note 2: When the capacity for manual acquisition is reached, an appropriate message
appears in the text message area. Cancel tracking of non-threatening targets if you
wish to acquire additional targets manually.
appears in the text message area. Cancel tracking of non-threatening targets if you
wish to acquire additional targets manually.
Note 3: Acquisition is also possible with the ROTOkeys. Select the target to acquire,
long-push the Rotary Knob, choose the Target ROTOkey followed by the Acquire RO-
TOkey.
long-push the Rotary Knob, choose the Target ROTOkey followed by the Acquire RO-
TOkey.
4.3 Clearing a Lost Target
On the radar or chart plotter display, place the cursor on the lost target and select the
ROTOkeys Target and Clear Lost.
ROTOkeys Target and Clear Lost.
ARPA
Symbol
Meaning
Immediately after acquisition.
Within 20 scans of the antenna after acquisition, a vector appears to show a trend
of movement.
of movement.
Within 60 scans of the antenna after acquisition, the plotting symbol changes to a
small circle, indicating steady-state tracking condition.
small circle, indicating steady-state tracking condition.
Lost target is indicated by flashing diamond symbol. The diamond is formed from
two equal triangles.
two equal triangles.
(flashing)