1. OPERATIONAL OVERVIEW
1-41
2. Select [CURSOR], then press the
left button
.
3. Select [EBL/VRM], then press the
left button
.
4. Select [EBL1] or [EBL2] as appropriate, then press the
left button
.
5. Select the [REL] or [TRUE] as appropriate, then press the
left button
.
6. Close the menu.
Note:
The EBL and its indication change according to gyrocompass changes as fol-
lows:
1.33
Collision Assessment by Offset EBL
The origin of the EBL can be placed anywhere with the Trackball 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.
1.33.1
How to assess risk of collision using the offset EBL
There are two methods for assessing risk collision. You can use the control unit or the
[CURSOR] menu.
Using the control unit (RCU-029)
Note:
The [EBL OFFSET] function must be assigned to a function key (F1, F2 or F3)
for this method. See section 1.13 for how to assign the function keys.
Gyro heading
EBL changes
HEAD UP / relative
EBL indication and EBL marker are unchanged.
HEAD UP / true
EBL indication does not change, however the EBL
marker moves accordingly
COURSE UP / relative
EBL indication does not change, however the EBL
marker moves accordingly.
COURSE UP / true
EBL indication and EBL marker are unchanged.
NORTH UP / relative
EBL indication does not change, however the EBL
marker moves accordingly
NORTH UP / true
EBL indication and EBL marker are unchanged.
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A
A
1
A
A
1
No. 1
EBL
No. 1
EBL
EBL1
>169.7°T<
VRM1
>3.85NM<
EBL1
>145.1°T<
VRM1
>3.85NM<
(a) (b)
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