Navigation PPLbasic
What onboard equipment is required to receive and display signals from an NDB?
Answer
ADF
Explanation
An **automatic direction finder (ADF)** receives NDB signals and provides bearing information to the beacon. A CDI is commonly associated with course-deviation navigation such as VOR, while an SSR transponder replies to surveillance radar interrogations. An HSI may display navigation information but is not, by itself, an NDB receiver.\n\n**Key takeaway:** NDB reception requires an ADF receiver.\n\n**Glossary:** **NDB**: non-directional beacon; **ADF**: automatic direction finder.
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