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If ATC terminates radar service while departing Class C airspace, what transponder code should be set?

  1. 7500

  2. 1200

  3. 7600

  4. 7700

The correct answer is: 1200

When ATC terminates radar service while departing Class C airspace, pilots should set their transponder to 1200. This code is used to indicate that the aircraft is operating in VFR (Visual Flight Rules) mode, which is applicable once you leave radar coverage or are no longer being actively monitored by ATC. It signifies that the aircraft is no longer receiving radar services and is transitioning to non-towered operations or visual navigation. The other transponder codes serve different purposes; for example, 7500 indicates a hijacking, 7600 signals a communication failure, and 7700 is an emergency code. Using 1200 is the standard procedure in this context to ensure proper identification and tracking as the pilot continues their flight under VFR.