Navigation PPLintermediate
Select ALL correct statements about radar, transponders, and GPS.
Answer
Primary radar detects energy reflected by the aircraft., SSR relies on a transponder reply., Code 7600 indicates radio communication failure., Four satellites are used for a precise three-dimensional GPS position solution.
Explanation
All four statements describe the systems correctly. Primary radar receives reflected energy; SSR uses transponder replies. Code 7600 signals communication failure. Four satellite measurements support a three-dimensional position solution while resolving receiver clock offset. **Key takeaway:** Know what each system measures and how it obtains the information. **Glossary:** **SSR**: secondary surveillance radar; **GPS**: Global Positioning System.
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