Which transponder code indicates a radio communication failure?

Answer

7600

Explanation

Code **7600** indicates loss of radio communications. Code 7500 indicates unlawful interference, while 7700 indicates a general emergency. Code 7000 is a common VFR conspicuity code in some regions, subject to local procedures.\n\n**Key takeaway:** Memorize 7500 unlawful interference, 7600 communications failure, and 7700 emergency.\n\n**Glossary:** **Transponder code**: selected code transmitted by an aircraft transponder.

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