Furuno color video plotter GD1720C - Manual (Page 42)

2. RADAR OPERATION
2-11
2.11 Measuring the Bearing
There are two ways to measure the bearing to a target: by the cursor, and by the EBL
(Electronic bearing Line).
2.11.1 Measuring bearing by cursor
Use the Cursor pad to place the cursor at the center of the target. The bearing to the target
appears in the range and bearing box at the bottom right-hand corner on the screen.
2.11.2 Measuring bearing by EBL
1. Press the EBL/VRM key.
2. Press the EBL1 ON (dotted line EBL) or EBL2 ON (dashed line EBL) soft key to select
the desired EBL. The selected EBL’s indication, at the bottom of the screen, is
highlighted.
3. Rotate the ENTER knob to bisect the radar target with the EBL. Read the EBL indication
to find the bearing to the target.
.250/ 319.9
°
M .125nm
SP
H-UP
EBL1
(Dotted line)
EBL2
(Dashed line)
EBL2 bearing
Active marker is highlighted.
+
359.9 ° R
0.24nm
EBL1 bearing
R: Relative
T: True
EBL
VRM
EBL1
330.1 ° R
VRM1
-.---nm
EBL2
234.1 ° R
VRM2
-.---nm
EBL1
ON
VRM1
ON
OFFSET
EBL2
ON
VRM2
ON
How to measure bearing with the EBL
4. You may hide the EBL/VRM soft keys by pressing the EBL/VRM key.
Note:
The bearing to a target may be shown relative to own ship’s heading (Relative) or
True bearing (requires heading data). This may be done with “EBL REFERENCE,” which is
in the RADAR DISPLAY SETUP menu.
2.11.3 Various EBL operations
Erasing an EBL, EBL indication: Press appropriate EBL soft key, then press the CLEAR
key. The EBL is erased and its indication becomes blank.
Erasing, hiding, moving EBL/VRM data boxes:
See paragraph 2.10.4.