Search Device used in Radar

Radar is a search device that sends out a burst of radio energy that scatters out, and a little bit comes back. And they measure the time between sending out electronically and back. And radio waves travel at a constant speed. You can measure down to yards, how far that is. Navigation systems, what they did, one beacon over here, and another beacon over here … they would transmit simultaneously. And if you measure, if you’re out here, it’ll be a certain distance between receiving the two of them. Or out here, and you then have a track. And as you measure the time differences, you create a map over your existing area. So there are the two differences. One is measuring a return signal, and the other is measuring the difference in two transmitted signals. That’s the navigation side. The other is the detection side. And all other stuff begins from there.