CRT Marine RADAR is a RADAR system that displays to an CRT Display
(Cathode Ray Tube). CRT Displays are available in single color format. Large and
small CRT displays have been used since RADAR was first produced in the 1940's.
Marine
Radar is a system that uses
electromagnetic waves to identify the range, altitude, direction, or
speed of both moving and fixed objects such as
aircraft, ships, motor vehicles, weather formations, and terrain.
The term RADAR was coined in 1941 as an
acronym for Radio Detection and Ranging.
The term has since entered the English language as a standard word,
radar, losing the capitalization. Radar was originally called RDF
(Radio Direction Finder) in the United Kingdom.
A radar system has a transmitter that
emits either
microwaves or
radio waves that are reflected by the target and detected by a
receiver, typically in the same location as the transmitter. Although
the signal returned is usually very weak, the signal can be amplified.
This enables radar to detect objects at ranges where other emissions,
such as sound
or
visible light, would be too weak to detect. Radar is used in many
contexts, including
meteorological detection of
precipitation,
measuring ocean surface waves,
air traffic control,
police
detection of
speeding traffic,
and by the military.
Marine RADAR is available with LCD and CRT Displays. It also available in a
variety of power capacity, range, Frequency, size, features and price. Premier
manufacturers include Furuno,
Raymarine,
Simrad,
JRC,
Si-Tex,
GARMIN, and
ICOM.
