1. OPERATIONAL OVERVIEW
1-55
1.34
Collision Assessment by Offset EBL
The origin of the EBL can be placed anywhere to enable measurement 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 us-
ing the EBL range marker as shown in (a) in the illustration below. If the EBL passes
through the sweep origin (own ship) as shown in (b) in the illustration below, the target
ship is on a collision course.
1.34.1
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-014)
1. Press the
EBL ON
key to display or activate an EBL (EBL1 or EBL2).
2. Place the cursor on a target appearing as threatening (indicated as “A” in the ex-
ample figure on the previous page).
3. Press the
EBL OFFSET
key and the origin of the active EBL shifts to the cursor
position.
4. Press the
EBL OFFSET
key again to anchor the EBL origin.
5. After waiting for a few minutes (at least 3 minutes), operate the
EBL
knob until the
EBL bisects the target at the new position (A
1
). The EBL readout shows the target
ship's course, which can be true or relative depending on the EBL bearing refer-
ence setting.
Note:
If relative motion is selected, it is also possible to read CPA by using the
range marker as shown in left-hand figure at the top of the next page. If the EBL
passes through the sweep origin (own ship) as illustrated in the right-hand figure
above, the target ship is on a collision course.
6. To return the EBL origin to the own ship's position, then press the
EBL OFFSET
key.
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No. 1
EBL
No. 1
EBL
(a) (b)
EBL
range
marker
EBL
range
marker
Summary of Contents for FAR-2218
Page 132: ...1 OPERATIONAL OVERVIEW 1 110 This page is intentionally left blank ...
Page 176: ...3 TARGET TRACKING TT 3 36 This page is intentionally left blank ...
Page 202: ...4 AIS OPERATION 4 26 This page is intentionally left blank ...
Page 232: ...5 VIDEO PLOTTER OPERATION 5 30 This page is intentionally left blank ...
Page 294: ......