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An automatic direction finder (ADF) is a marine or aircraft radio-navigation instrument that automatically and continuously displays the relative bearing from the ship or aircraft to a suitable radio station.
An automatic direction finder (ADF) operates off of a ground signal transmitted from a NDB. Early radio direction finders (RDF) used the same principle. A vertically polarized antenna was used to transmit LF frequency radio waves in the 190 kHz to 535 kHz range.
Automatic direction finding (ADF) is an electronic aid to navigation that identifies the relative bearing of an aircraft from a radio beacon transmitting in the MF or LF bandwidth, such as an Non-Directional Beacon or commercial radio broadcast station.
The pointer indicating the direction of the signal moves around the dial to indicate the direction relative to the aircrafts heading. The pilot has to then make mathematical calculations to determine the magnetic or true bearing of the aircraft from the beacon in order to plot a position line.
ADF stands for automatic direction finder. Based on simple AM-radio ground stations called NDBs (non-directional beacons), an ADF is an aircraft instrument with a directional arrow-shaped pointer. The arrow simply points straight at the programmed NDB’s position in relation to the aircraft.
30 Ιουν 1999 · The ADF is an Automatic Direction Finder. It will do exactly what its name says. The ADF automatically points in the direction of the NDB (Non-Directional Beacon) you tune in —...
The Automatic Direction Finder (ADF) is an aircraft navigation product that automatically calculates the relative bearing of the aircraft to the radio station. The ADF-900 is part of the latest generation of highly successful ADF sensors from Collins Aerospace.
