| Main Entry: | direction finder |
| Part of Speech: | noun |
| Definition: | radio signal receiver |
Synonyms: |
GPS, Global Positioning System, high-frequency direction finder, huff-duff, radio direction finder |
| Main Entry: | radio compass |
| Part of Speech: | noun |
| Definition: | radio direction finder |
Synonyms: |
RDF, direction finder, navigational aid, triangulator, wireless compass |