EASA NAV(A)basic
Which aircraft instrument can be influenced by electronic devices on board?
Answer
Direct-reading compass
Explanation
Electronic equipment and electrical currents can create magnetic fields that disturb a direct-reading magnetic compass. The other listed instruments do not depend on a freely aligning magnetic element in the same way. **Key takeaway:** Protect compass accuracy from magnetic and electrical interference. **Glossary:** **Direct-reading compass**: A magnetic compass displaying direction directly; **interference**: An unwanted influence on an instrument indication.
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