Datatrak was a hyperbolic radio navigation system similar to Decca, which operated on frequencies between 130 kHz and 150 kHz in the LF-range. Datatrak was operated in the UK by Securicor Information Systems and by Siemens-Datatrak on continental Europe and was originally used for the surveillance of vehicles of Securicor, but later also allowed for the use of other customers.
Datatrak was a hyperbolic radio navigation system similar to Decca, which operated on frequencies between 130 kHz and 150 kHz in the LF-range. Datatrak was operated in the UK by Securicor Information Systems and by Siemens-Datatrak on continental Europe and was originally used for the surveillance of vehicles of Securicor, but later also allowed for the use of other customers.
Source: Wikipedia "Datatrak" · CC BY-SA 4.0
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