Navigation PPLintermediate
Select ALL correct statements about DME.
Answer
DME determines distance using signal travel time., DME reports slant range., DME operates in the UHF band.
Explanation
DME measures the round-trip timing of interrogations and replies and converts the delay into range. The displayed value is **slant range**, the direct distance between aircraft and station, rather than horizontal distance over the ground. DME operates in UHF. Slant-range error is proportionally most significant close to the station, especially at altitude.\n\n**Key takeaway:** DME is time-based UHF equipment that reports slant range.\n\n**Glossary:** **UHF**: ultra-high frequency; **slant range**: direct three-dimensional distance to a station.
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