The information provided by the radar includes bearing and the distance (and therefore the position) of the object from the radar scanner. Therefore, it is used in many areas where the need for such positioning is crucial. The first use of the radar was for military purposes: to locate the air, land and targets of the sea. This practice has evolved in the civilian field in aircraft applications, ships and roads.
In aviation, aircraft are equipped with radar devices that warn aircraft or other obstacles or approach their path, display meteorological information and give accurate altitude readings. The first commercial device installed on the aircraft was a Bell Lab unit on some 1938 United Air Lines aircraft. These aircraft can land in fog in airports equipped with assisted terrestrial controlled radar systems in the flight of the aircraft is observed on the radar screens while landing operators radio directions, the pilot.
Marine radars are used to measure the direction and distance of ships to avoid collision with other ships, sailing and establishing its position in the sea when they are within range of the coast and other fixed references such as islands , Buoys and ships. In the service of the traffic of the port systems or the radar port of the ship, they are used to monitor and regulate the movements of the ships in the occupied waters.
Meteorologists use radar to monitor rainfall and wind. It has become the main tool for short-term weather forecasting and monitoring of severe weather events such as thunderstorms, tornadoes, winter storms, precipitation patterns, etc. Geologists use specialized radars to penetrate the soil to map the composition of the earth’s crust. Police use radar guns to monitor the speed of vehicles on roads. Smaller radar systems are used to detect human movement. Examples are the detection of breathing patterns for sleep monitoring and the detection of hand and finger gestures to interact with computers.