JRC JMA-9832-SA Instruction Manual page 184

7 Using the trackball, move the VRM2 marker on a dotted-line of EBL2 to the point B.
The VRM2 marker moves away from the center of the display by turning the trackball
clockwise, and closer to the center.
The bearing and range between the two points will appear in the "VRM2" and "EBL2" area on the
lower right of the radar display.
EBL2
VRM2
EBL Control
Fig.4.3
4 – 5