Furuno FAR-1518 User Manual

1. OPERATIONAL OVERVIEW
1-35
1.31 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.
1.31.1 How to show/hide the range rings
1. Open the [MAIN MENU].
2. Select [NAVTOOL], then push the ADJUST knob.
3. Select [RANGE RING], then push the ADJUST knob.
4. Rotate the ADJUST knob to select [ON] or [OFF] as appropriate, then push the
ADJUST knob.
5. Close the menu.
1.31.2 How to measure range with the variable range marker (VRM)
There are two VRMs, No. 1 and No. 2, which appear as dashed rings so that you can
distinguish them from the fixed range rings. The two VRMs can be distinguished from
each other by the different lengths of their dashes; the dashes on the No. 2 VRM are
longer.
There are two methods for measuring range with the VRMs, using the VRM key and
on-screen menu box operation.
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VRM1
VRM2
>0.66NM<
1.18NM
45:02
99:59
TTG to VRM
No. 1
VRM
No. 2
VRM
Target
Currently active VRM is
shown enclosed in “>....<”

Furuno FAR-1518 Specifications

General

Brand	Furuno
Model	FAR-1518
Category	Marine Radar
Language	English