JMA-9100 Instruction Manual > 4.MEASUREMENT OF RANGE AND BEARING > 4.1  USE OF NAVIGATION TOOLS
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VRM Operation
The range value of the current   or   on the PPI display is shown in the 
VRM1/2 range located at the upper right of the display. The currently operable VRM1 or 
VRM2 is highlighted in the       button located at the upper right of the 
display.
4.1.3.4 To operate VRM (VRM)
Procedures
1)  Press the [VRM1] or [VRM2] key.
The    and    buttons (located at the upper right of the display) will be 
highlighted, and the selected VRM becomes operable.
2) Turn the [VRM] dial.
To turn the [VRM] dial to the right, the VRM control wide, to turn the [VRM] dial to the 
left, the VRM control narrow.
Cance l
1) Press the [VRM1] or [VRM2] key again.
The selected EBL display will disappear.
VRM2
EBL2
VRM1
EBL1
VRM1
VRM2
VRM1
VRM2
VRM1
VRM2