Radar Introduction - Furuno MFD12 Operator's Manual

1.8

Radar Introduction

A radar system operates in the microwave part of the radio-frequency (RF) range. The
radar detects the position and movement of objects. Objects are shown on the radar
display at their measured distances and bearings in intensities according to echo
strength.
The radar display is available in head-up, course-up and north-up modes and orienta-
tion in true and relative motion. The relative motion display shows other vessels move-
ment relative to your vessel. The true motion display shows your vessel and other
objects in motion according to their true courses and speeds.
Two VRMs measure the range to targets, and two EBLs measure the bearing to tar-
gets. A guard zone tells you when the radar targets are in the area you indicate. The
trail of targets can be shown in afterglow to monitor their movements.
The dual-range display scans and displays two different radar ranges at the same
time. This display lets you watch on both short and long ranges at the same time.
Range, range ring
interval
Status bar
Presentation
mode icon,
Motion mode
icon
Fixed range
rings
EBL box
(hidden when
no EBL is
active)
* Inactive cursor is shown as a plus sign.
Cursor looks like this
Text message area
Guard
North
zone
marker
Heading
line
EBL1
Cursor*
Data boxes
when in motion.
Window for adjustment of gain,
sea and rain (normally hidden)
Heading
Cursor data (position and
range and bearing alternately)
VRM1
+
Bearing
scale
Own ship
icon
VRM2
EBL2
1. System Introduction
Sensor icons
VRM box
(hidden when
no VRM is active)
1-9