Measuring The Range; Measuring Range By Range Rings; Measuring Range By Cursor - Furuno NAVNET 1824C 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.
3. Press the RINGS soft key to turn the rings on and select desired brilliance.
4. Press the RETURN soft key to finish.

2.10.2 Measuring range by cursor

Operate the Trackball to place the cursor intersection on the inside edge of the radar target.
The range to the target, as well as the bearing, appears to the right of "+" at the bottom of
the display.
12/
LP
H-UP
2-8
Cursor
3nm
How to measure range to a target with the cursor
Target
319. 9 M
SIGNAL
PROC.
RADAR
DISPLY
NAV
FUNC
TARGET
ZOOM &
D. BOX
11.2 °R
+
11.70
nm
Range and bearing from
own ship to cursor