The radiogoniometer is a measuring instrument invented in the thirties. This receiver can detect the origin of a radio broadcast. Boats and airplanes often use radiogoniometer to accurately determine their position and heading by triangulation. By capturing fixed radiobeacons on the ground, a device radiogoniometer can lead to a specific radiophare. In the case of French nuclear overflights by drones in October 2014, military radiogoniometer were available to police to go back to the people who remote these devices. It should be noted that some of the UAV are scheduled in advance to rally various GPS points. As a result, these non-remote drones are not detectable with radiogoniometer.

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