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1.14 Measuring Bearing
Measuring bearing by cursor
Rotate the trackball to set the cursor intersection
on the center of the target. The bearing to the cur-
sor intersection appears at the bottom of the dis-
play.
Measuring bearing by EBL
1) Press the EBL ON key to enable an EBL. Each
pressing of the key enables the No.1 EBL or
No.2 EBL alternately. The active marker's
readout is circumscribed.
2) Operate the EBL control to bisect the target
with the EBL.
3) Check the EBL readout at the bottom left cor-
ner of the display.
No.1 EBL bearing
No.2 EBL bearing
Figure 1-12 How to measure bearing by EBL
Note 1: You can display EBL bearing relative to
own ship (relative) or with reference to the north
(True). For further details see 1.35 Selecting Unit
of Range Measurement, Bearing Reference.
Note 2: Suffix "T" denotes true bearing (for gy-
rocompass input) and suffix "M" denotes mag-
netic bearing (magnetic compass input).
Erasing EBLs
1) If two EBLs are displayed, press the EBL ON
key to circumscribe the EBL readout of the
EBL you want to keep active.
2) Press the EBL OFF key. The EBL readout and
its associated EBL are erased.
No.1
EBL
No.2
50.0°R
EBL
EBL
80.0°R
1.15 Collision Assessment by
the Offset EBL
The origin of the No.1 EBL can be placed any-
where with the trackball to assess the risk of col-
lision, as well as to measure the range and bearing
between two targets.
1) Press the EBL ON key to turn on (or activate)
the No.1 EBL.
2) Press the CURSOR OFFSET key.
3) Operate the trackball to place the No.1 EBL
origin on the target.
4) Operate the EBL control to pass the No.1 EBL
through the screen center.
You can anchor the EBL, to continue monitoring
target's track, by pressing the CURSOR OFFSET
key again. If the target tracks along the No.1 EBL
toward the screen center, the possibility of colli-
sion exists.
Target
70.0°R
No.1
EBL bearing
Figure 1-13 How to assess risk of collision
No.1 EBL
Target
(initial position)
EBL
1 – 13
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