How To Measure Bearing; Methods To Measure Bearing; True Or Relative Bearing - Furuno FAR-1416 Operator's Manual

1. OPERATIONAL OVERVIEW
1.32

How to Measure Bearing

The Electronic Bearing Lines (EBLs) are used
to take bearings of targets.There are two EBLs,
EBL1 and EBL2. Each EBL is a straight dashed
line extending out from the own ship position up
to the circumference of the radar picture. The
two EBLs can be distinguished from each other
by the different lengths of their dashes; the
dashes on EBL2 are longer.
Each EBL has an EBRL (Electronic Bearing
Range Line, indicated as a short line, crossing
the EBL at right angles). When VRM is not dis-
played and only EBL is displayed, the EBRL
shows the range from the EBL origin.
When VRMs are displayed with EBLs the VRM overlaps the EBRL. The value for
EBRL and VRM is the same and is displayed in the VRM box at the bottom-right of the
screen.
1.32.1

Methods to measure bearing

There are two methods for measuring bearing, using the EBL key and on-screen
menu box operation.
Using the EBL key
1. Press the EBL key to display the EBL boxes. Press the key again to change be-
tween EBLs. The currently active EBL appears as shown in the figure below.
2. Rotate the EBL knob until the active EBL bisects the target of interest, and read
its bearing at the lower-left corner of the screen.
3. Press and hold the EBL key to erase the active EBL.
The inactive EBL indication disappears first. The active EBL indication disappears
when EBL key is pressed and held more.
Using the EBL box
1. Press the CURSOR ON/OFF key when cursor is not shown on the screen.
2. Move the cursor onto the EBL (1 or 2) box, then press the left button.
3. Rotate the trackball to move the cursor onto the center of target, then read its
bearing at the lower-left corner of the screen.
4. Press the right button to erase the active EBL.
1.32.2

True or relative bearing

The EBL readout is affixed by "R" (relative) if it is relative to own ship's heading, "T"
(true) if it is referenced to the north. True or relative indication is available regardless
of presentation mode.
1. Open the [MAIN MENU].
1-40
>189.5°T<
EBL1 Currently active EBL is
shown enclosed in ">...<"
159.8°T
EBL2
000
No. 2 010
350
340 020
330
EBL
320
310
300
290
280
270
260
Range markers
250
on EBLs
240
230
220
210
200
160
190
170
180
> 33.0 ° T<
EBL1
299.0 ° T
EBL2
Target
030
blip
040
050
060
070
080
No. 1
EBL
090
100
110
120
130
140
150
>10.2 <
VRM1 NM
12.1
NM
VRM2