JRC JMR-5410-6XH - Using the Range Rings

4-7 Section 4 Range and Bearing Measurement Methods
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4.4 Using the Range Rings
Range rings are multiple concentric circles displayed on the PPI screen.
Using range rings on the PPI screen, the range to a target can be measured by determining at which
scale interval the target is positioned.
The display of range rings can be turned on/off according to the following procedure.
1 Click the Rings button in Range and mode information.
Each time this button is clicked on, display switches between On and Off.
On:
Off:
Memo
By using the dialogue that is displayed by clicking on [View] - [Tools] on the menu, the
display can be switched to On/Off.
The colour and brilliance of Range Rings can be set. For the detais, refer to "11.1.11 Setting
up the Display of Range/Bearing Measurement Function".