Measuring The Range; Measuring Range By Range Rings - Furuno 1722C Operator's Manual

2. RADAR OPERATION
2.10

Measuring the Range

You can measure the range to a radar target three ways: by the range rings, by
the cursor, and by the VRM (Variable Range Marker).
2.10.1

Measuring range by range rings

Count the number of rings between the center of the display and the target.
Check the range ring interval and judge the distance of the echo from the inner
edge of the nearest ring.
To turn the range rings on, do the following:
1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.
2. Press the RADAR DISPLY soft key.
.250/
H-UP
3. Press the RINGS soft key to select ON (MODEL1722 series) or desired
brilliance (MODEL1722C series) among LOW, MED and HIGH.
4. Press the RETURN soft key to finish.
2-12
.125nm
319.9 M
SP
359.9 R
+
0.24nm
MODEL1722C series
Radar display soft keys
.125nm
.250/
RADAR
SP
DISPLAY
H-UP
MODE
HD UP
SHIFT
RINGS
MED
HL
OFF
RETURN
319.9 M RADAR
DISPLAY
MODE
HD UP
SHIFT
RINGS
ON /OFF
HL
OFF
RETURN
359.9 R
+
0.24nm
MODEL1722 series