Furuno FAR-1416, Operator'S Manual

Page: 54 / 226

1. OPERATIONAL OVERVIEW
1-40
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].
000
010
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090
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350 No. 2
EBL
Target
blip
No. 1
EBL
Range markers
on EBLs
VRM1
VRM2
12.1
NM
EBL1
EBL2
> 33.0°T<
299.0°T
>10.2
NM
<
EBL1
EBL2
>189.5°T<
159.8°T
Currently active EBL is
shown enclosed in “>...<”