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Radio direction finder
Radio direction finding (RDF) was developed as a navigational aid in the 1920s and was widely used in the decades that followed. It works by using a rotatable aerial to determine the direction in which the signal from a known radio transmitter comes through most strongly. It was particular useful when sailing fairly close to the shore, up to about 25 miles (40 km).
This RDF receiver has a circular aerial loop that has a pointer to indicate its direction. The receiver can be set for three wavelength ranges: long wave (LW), medium wave (MW) and trawler band (TB).
This RDF receiver has a circular aerial loop that has a pointer to indicate its direction. The receiver can be set for three wavelength ranges: long wave (LW), medium wave (MW) and trawler band (TB).
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Object Details
| ID: | ZBA0329 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Radio direction finder |
| Display location: | Not on display |
| Creator: | Beme Electronic and Marine Equipments Ltd |
| Date made: | circa 1950 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 475 mm x 205 mm x 285 mm |
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