Measuring Range And Bearing Between Two Targets - Furuno FAR-2807 Operator's Manual

1. RADAR OPERATION
1.22 Measuring Range and Bearing Between Two
Targets
By keyboard
1. Press the [EBL OFFSET] key. Operate the trackball to place the origin of the
No. 1 EBL, for example, on a target of interest (target 1 in the illustrated
example).
2. Operate the EBL rotary control until the EBL passes through another target of
interest (target 2).
3. Operate the VRM rotary control until the range marker on the EBL is on the
inside edge of target 2. The active VRM readout at the lower-right corner of
the screen indicates the distance between the two targets.
4. You can repeat the same procedure on third and fourth targets (targets 3 and
4) by using the No. 2 EBL and the No. 2 VRM.
Bearing is shown relative to own ship with suffix "R" or as a true bearing with
suffix "T" depending on EBL relative/true settings of EBL CURSOR BEARING in
the MARK menu. To return the EBL origin to the screen center, press the [EBL
OFFSET] key again.
By trackball
1. Display an EBL, following the
steps 1-3 in section 1.20.1.
2. With the cursor inside the
effective display area, push the
left button, roll the scrollwheel
to show "EBL OFFSET / EXIT"
in the guidance box then push
the left button.
3. Use the trackball to put the
cursor on target 1 then push
the left button.
4. Operate the No. 1 VRM until
the range marker on the EBL
aligns with target 2. The active
VRM readout at the lower-right
corner of the screen indicates the distance between the two targets.
5. You can repeat the same procedure on third and fourth targets (targets 3 and
4) by using the No. 2 EBL and the No. 2 VRM.
To return the EBL origin to the screen center, show "EBL OFFSET / EXIT" in the
guidance window then push the left button.
1-38
Range
000
350
340
330
Marker
320
310
Target 2
300
Target 4
No.1
290
EBL
Target 1
280
270
EBL
260
origin
250
240
230
220
210
>140.0 R<
EBL1
200
190
180
335.2 R
EBL2
Range/bearing
between targets
1 and 2
No. 2
010
EBL
020
030
040
050
Range
060
Marker
070
R2
080
090
Target 3
100
110
120
130
140
150
>0.50NM<
VRM1
160
170
0.98NM
VRM2
Range/bearing
between targets 3 and 4