2. RADAR OPERATION

2.17 Using the Offset EBL

The offset EBL can be used to predict a potential collision course. It can also be used to measure the range and bearing between two targets.

2.17.1 Predicting collision course

The procedure below may be used to check if a radar target is on a potential collision course with your vessel.

1.Press the EBL/VRM key to show the EBL/VRM soft keys.

2.Press the A: EBL1 ON soft key to turn on the EBL1.

3.Press the C: OFFSET soft key. The origin of EBL1 moves to the cursor position, which is marked with an “X.”

4.Use the Trackball to place the cursor on the radar target which looks like it might be on a collision course with own ship.

5.Push the ENTER knob to fix the origin position.

6.After waiting for a few minutes (at least three minutes), rotate the ENTER knob so the EBL bisects the target at the new position. If the target tracks along the EBL towards the center of the display (your ship’s position), the target may be on a collision course with your vessel.

To cancel the offset EBL, press the C: OFFSET soft key.

3nm

319. 9°M

 

12/LP

EBL

H-UP

 

VRM

 

 

A EBL1

 

 

ON

Target tracked

B

VRM1

here

 

ON

 

 

Initial target

C OFFSET

 

 

position

D

EBL2

 

 

ON

 

 

E

VRM2

 

 

 

ON

EBL1

45.0˚R

+

359.9 ˚R

VRM1

-.---nm

 

11.70nm

Predicting collision course with the offset EBL

2-15

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Image 44
Furuno 1964C-BB, GD-1920C-BB, 1954C-BB, 1944C-BB Using the Offset EBL, Predicting collision course with the offset EBL