Sometimes a VOR station does not operate as expected and will behave as a NDB.Always be sure to know the identity of a station before using it. The strongest signal is not always the nearest. Our equipment will tune into the signal that is strongest. Often there are radio beacons near each other that transmit on the same frequency.For approach and landing there is no replacement for radio beacons. If the GPS fails the course is back on radio beacons. Satellite navigation (GPS) is taking over parts of radio navigation but each pilot will base their primary course on radio beacons and then use the GPS. With a non-directional beacon ( NDB) station we use the heading bug, with a VHF omni-directional range ( VOR) station we select the radial to use and the autopilot keeps us on that course. Our aircraft have an autopilot and radio beacons are ideal for automated flight. The time that a pilot had to fly with the yoke in their hands all the time has long been passed. Radio beacons are placed near airports, can be aligned with runways and can be placed in remote areas so to mark a route over them. The position of radio beacons is clearly marked on navigation maps. Radio beacons can be seen with the right equipment, from far away and independent of the weather. Instead of relying on visual landmarks (such as roads, rivers, churches, and towns) for navigation under visual flight rules ( VFR), radio navigation relies on radio beacons and is therefore a critical part of instrument flight rules ( IFR).
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