1. System Introduction
1-9
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.
EBL box
(hidden when
no EBL is
active)
Data boxes
VRM box
(hidden when
no VRM is active)
Sensor icons
Window for adjustment of gain,
sea and rain (normally hidden)
* Inactive cursor is shown as a plus sign.
Cursor looks like this when in motion.
Cursor data (position and
range and bearing alternately)
Heading
Cursor*
VRM1
EBL1
VRM2
Fixed range
rings
EBL2
Bearing
scale
Heading
line
Own ship
icon
North
marker
Range, range ring
interval
Status bar
Presentation
mode icon,
Motion mode
icon
Guard
zone
Text message area
+
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