Chapter 1: Operational Overview
1-8
1.7 Radar Display Overview
A radar system operates in the ultra-high-frequency (UHF) or microwave part of the
radio-frequency (RF) spectrum, and is used to detect the position and movement of
objects. Objects are shown on the radar display at their measured distances and bear-
ings, 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. Relative motion shows other ships movement relative
to own ship, True motion shows own ship and other moving objects moving in accor-
dance with their true courses and speed.
Dual VRMs are provided to measure the range to objects, and dual EBLs to measure
the bearing to targets. A guard zone can be created to be alerted to targets in a spe-
cific area. The trail of targets can be shown in afterglow to monitor their movement.
Range, range ring interval
Status bar
Presentation
mode icon
Motion mode
icon
Fixed range
rings
EBL box
(normally
hidden)
Nav data
VRM box
(normally
hidden)
EBL1
EBL2
VRM2
VRM1
Heading
line
Guard
zone
Heading
Window for adjustment of
gain, sea and rain clutter
(normally hidden)
Text message area
Sensor icons
Cursor
+
HU TM
90.0
°
T
North
marker
