Furuno FR-2125V - Manual (Page 95)

5-13
5.9 Displaying Target Data
The ARPA mode (with built-in ARP-26 optional board) provides the full functionality of
ARPA as required by the IMO Resolution A.823(19) and IEC 60872-1, including display of
range, bearing, course, speed, CPA and TCPA of all plotted targets. Data on one target
may be displayed.
In the head-up and head-up true bearing modes, target bearing, course and speed shown
at the center of the display become true (suffix “T”) or relative (suffix “R”) to own ship in
accordance with the true/relative vector setting. In north-up, course-up and true motion
modes, the target data field always displays true bearing, true course and speed over-the-
ground or thru-the-water.
Place the cursor on a desired target and press the [TARGET DATA] key. Target data is
displayed as below.
RNG/BRG (Range/Bearing): Range and bearing from own ship to the selected target with
suffix “T” (True) or “R” (Relative).
CSE/SPD (Course/Speed): Course and speed are displayed for the selected target with
suffix “T” (True) or “R” (relative).
CPA/TCPA: CPA (Closest Point of Approach) is the closest range a target will approach to
own ship. TCPA is the time to CPA. Both CPA and TCPA are automatically calculated.
When the CPA has passed clear of own ship, it is indicated by a TCPA with a negative (-)
sign. TCPA is counted to 99.9 minutes and beyond this it is indicated as TCPA> -99.9MIN.
BCR (Bow Cross Range): Range at which target is to cross own ship’s bow.
BCT (Bow Cross Time): Time of BCR
000 010
020
030
040
050
060
070
080
090
100
110
120
130
140
150
160
170 180 190
200
210
220
230
240
250
260
270
280
290
300
310
320
330
340
350
0.439NM
122.7
°
T
254.2
°
T
14.9KT
0.4NM
0.0MIN
0.8NM
99.9MIN
RNG
BRG
CSE
SPD
CPA
TCPA
BCR
BCT>
01
Guard Zone
Acquisition Zone
01
Target in
GZ
Target accessed for data readout
Figure 5-8 ARPA plot