direction finder
Học thuậtThân thiện
Definition
Noun: A direction finder is a radio device used to determine the direction from which incoming radio waves are arriving. It is a navigational instrument that locates the source of a radio signal.
Usage
A direction finder is used to establish the bearing or azimuth of a radio transmitter. It is a compound noun that functions as a single unit. * The ship's captain used the direction finder to locate the distress signal. * Early aviation relied heavily on radio direction finders for navigation.
Advanced Usage
- Automatic Direction Finder (ADF): A specific type of radio navigation instrument used in aircraft that automatically indicates the relative bearing to a non-directional beacon (NDB) ground station.
- The pilot tuned the ADF, a type of direction finder, to the beacon's frequency.
Variants and Related Words
- Direction finding (n): The process or technique of determining the direction of radio waves.
- Radio direction finding is an essential skill for some search and rescue operations.
Synonyms
- Radio compass
- Goniometer (in specific technical contexts)
Related Phrases
- Take a bearing with a direction finder: To determine a specific directional line using the device.
- The operator took a bearing with the direction finder to triangulate the signal's source.
Noun
- radio; determines the direction of incoming radio waves