JRC JMA-5212-4 Simplified Manual page 11

5 Put the cursor on the EBL starting point is to be moved, and press the
[ENT] key.
The selected EBL starting point will be determined.
To return the EBL starting point to own ship's position
Procedures
1 Hold down [EBL] control.
The Jog Dial Button Mode will appear
2 Select 2 Floating EBL using Left Jog Dial, and set Floating EBL for Left
Jog Dial Mode.
3 When setting completes, EBL1 or EBL2 become operable
4 Press the [EBL] dial to set
switching.
The selected EBL starting point will be set as the own ship's position.
for the EBL1 / EBL2 starting point mode
S-9