EASA NAV(A)intermediate
Select ALL correct pairings of equipment and function.
Answer
ADF—receives NDB signals, Transponder—replies to SSR interrogation, DME—measures range by signal timing
Explanation
ADF receives NDB signals, a transponder answers SSR interrogations, and DME derives range from timing. VOR direction is based on phase comparison, not amplitude comparison. **Key takeaway:** Know which equipment performs each navigation function. **Glossary:** SSR: secondary surveillance radar; ADF: automatic direction finder.
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