How To Measure Range; How To Show/Hide The Range Rings - Furuno FAR-2228-NXT Operator's Manual

1.32

How to Measure Range

The range to a target can be measured three ways: with the fixed range rings, with the
cursor, or with the VRM.
Use the fixed range rings to get an estimate of the range to a target. The rings are the
concentric solid circles on the display. The number of rings is automatically set by the
current range scale. The distance between the rings is the range ring interval, and the
current interval appears at the upper-left position on the screen. To measure the range
to a target with the range rings, count the number of rings between the center of the
display and the target. Check the range ring interval and estimate the distance of the
echo from the inner edge of the nearest ring.
1.32.1

How to show/hide the range rings

Main menu operation
1. Open the menu.
2. Select [3 NAV TOOLS] to show the [NAV TOOLS] menu.
3. Select [4 RANGE RINGS].
4. Select [ON] or [OFF] as appropriate.
5. Close the menu.
Using the [CURSOR] menu (on-screen box)
1. Select the operational display area, then right-click. The [CURSOR] context menu
appears.
2. Select [RANGE RINGS].
3. Select [ON] or [OFF] as appropriate.
4. Close the menu.
Scrollwheel operation
With the menu closed, place the cursor inside the operational display area, spin the
scrollwheel to show “RANGE RINGS/EXIT” on the guidance box, then press the left
button to show/hide the range rings.
1. OPERATIONAL OVERVIEW
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