How Radar Works; Displaying Radar; Turning The Radar Transmitter On And Off - NorthStar 972 Quickstart Manual And Reference Manual

How radar works

The word "radar" is an acronym for "Radio
Detecting and Ranging." A radio trans-
mitter sends out a very short microwave
pulse, and then a receiver listens for that
signal's echo when it's bounced back from
a target in its path. Targets, which may be
other boats or ships, navigational markers,
flocks of birds, or land masses, are
displayed on the 972's screen. By knowing

Turning the radar transmitter on and off

Each time you turn on the Northstar 972,
the radar transmitter must be turned on
separately, as a safety feature.
To turn the transmitter on or off:

Displaying radar

The radar image includes:
Reference Manual Revision B
a compass rose to show the direction of
•
true or magnetic north
a gray heading line. This line indicates
•
your heading, not
Course-Over-Ground, and can be used
to compare the radar presentation with
the view in front of the vessel.
how long it takes for a signal to return, the
distance to a target can be determined. As
the radar antenna scans through a
360-degree rotation, it shows the target's
location relative to your position. By
watching repeated scans of a target, such
as another vessel, you can see how that
target is moving.
1. Press RADAR to display the radar screen.
Transmit
2. Press so it indicates
Standby
, as desired.
in the upper left corner, the transmit
•
status ( or
Transmit on
and the current radar scale (Range
indicates the distance from the center
to the largest range ring, and RR
indicates the spacing between the
range rings)
in the upper right corner, pulse length,
•
speed setting, rotation mode and Main
Bang Suppression (MBS)
Reference section 6 — Radar

How radar works

On
or
),
Transmit standby
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