True Or Relative Bearing; Collision Assessment By Offset Ebl - Furuno FAR-1513-BB Operator's Manual

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].
2. Select [NAVTOOL], then push the ADJUST knob.
3. Select [EBL•VRM], then push the ADJUST knob.
4. Select [EBL1] or [EBL2] as appropriate, then push the ADJUST knob.
5. Select the [REL] or [TRUE] as appropriate, then push the ADJUST knob.
6. Close the menu.
Note: The EBL and its indication change according to gyrocompass changes as fol-
lows:
Gyro heading
HEAD UP / relative
HEAD UP / true
COURSE UP / relative
COURSE UP / true
NORTH UP / relative
NORTH UP / true
1.33

Collision Assessment by Offset EBL

The origin of the EBL can be placed anywhere with the Touchpad to enable measure-
ment of range and bearing between any two targets. This function is also useful for
assessment of the potential risk of collision. It is possible to read CPA (Closest Point
of Approach) by using a VRM as shown in (a) in the illustration below. If the EBL pass-
es through the sweep origin (own ship) as shown in (b) in the illustration below, the
target ship is on a collision course.
340
330
320
310
A
300
290
280
1
A
270
260
250
240
230
No. 1
220
210
EBL
200
>169.7 ° T<
EBL1
EBL indication and EBL marker are unchanged.
EBL indication does not change, however the EBL
marker moves accordingly
EBL indication does not change, however the EBL
marker moves accordingly.
EBL indication and EBL marker are unchanged.
EBL indication does not change, however the EBL
marker moves accordingly
EBL indication and EBL marker are unchanged.
000
350 010
020
030
040
050
060
070
080
090
100
110
120
130
140
(a)
150
160
190
170
180
>3.85NM<
VRM1
1. OPERATIONAL OVERVIEW
EBL changes
000
350 010
340
330
320
310
A
300
290
1
A
280
270
260
250
240
230
No. 1
220
EBL
210
200
190
170
180
>145.1 ° T<
EBL1
020
030
040
050
060
070
080
090
100
110
120
130
140
150 (b)
160
>3.85NM<
VRM1
1-39