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Accurately describe how to use the communication radios, navigation radios, ADF, DME, transponder, ELT, and autopilot (if aircraft so equipped), and be able to list any limitations as to their useful range. Explain the process around confirming that each radio or equipment is in working condition per the manufacture’s operating manual or normal operation procedures. Student will also understand and explain the following transponder codes (1200, 7700, 7600, and 7500) and be able to list what each code communicates to ATC, as well as the function of Mode C and “Ident” button.