Section 4 Range and Bearing Measurement Methods  4-8 
4.5  Using the Electronic Bearing Line 
(EBL) and Variable Range Marker 
(VRM) 
 
4.5.1  Measuring a range and a bearing with EBL and 
VRM 
4.5.1.1  Measuring a range and a bearing with the trackball 
section of the operation unit 
When the cursor is in AUTO mode, EBL and VRM can be operated on the trackball section of the 
operation unit.This section describes the manipulation under EBL1 and VRM1; however, the same 
manipulation can be performed under EBL2 and VRM2 also. 
 
Memo 
To manipulate the EBL/VRM, the RADAR transmission status must be “Transmit”. 
1  Enable the manipulation of EBL1 by clicking on the [EBL1] button. 
 
2  Enable the movement of EBL1 by clicking on the EBL1 line. 
3  Align the cursor with a target and click on the mouse button. 
The bearing of the target is displayed on the [EBL1] button. 
 
4  Enable the manipulation of VRM1 by clicking on the [VRM1] button.   
 
5  Enable the movement of VRM1 by clicking on the VRM1 circle. 
6  Align the cursor with a target and click on the mouse button. 
The range of the target is displayed on the [VRM1] button. 
 
 button