When operating the transponder on the VFR code (1200), what is the minimum mode the transponder must be in?

When operating a transponder on the VFR code of 1200, the minimum mode that should be selected is Mode A. In aviation, a transponder serves as a means of aircraft location reporting and enhances safety by allowing air traffic control (ATC) to identify and track aircraft.

Mode A transponders transmit only the aircraft’s identification code, which is essential for VFR operations. This identification allows ATC to log and monitor the traffic pattern of aircraft operating under visual flight rules.

Mode C, which is a more advanced setting, includes altitude reporting in addition to the aircraft’s identification. While Mode C is beneficial and often required in certain controlled airspace, it is not a requirement for basic VFR operations. Therefore, for the minimum operational standard while influenced by a VFR code, Mode A is sufficient and correct.