JRC JMA-2354 - Setting Range Rings

Chapter 2 OPERATIONS
2.10 MARKER SETTING
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 Distance Unit
Sets the distance unit for cursor.
1 Open Cursor - Distance Unit .
NM : The distance unit is set to NM.
km : The distance unit is set to km.
sm : The distance unit is set to sm.
2.10.3 SETTING RANGE RINGS
Displays/hides the range rings.
 Setting the range rings
1 Open Marker - Range Ring .
Off : The range rings are not displayed.
On : The range rings are displayed.