What squawk code should be set during NORDO?

Setting a squawk code of 7600 is the correct choice during a NORDO (No Radio) situation. This specific transponder code alerts air traffic control that an aircraft is experiencing radio communication issues, which is crucial for maintaining situational awareness and ensuring safety in the airspace.

When an aircraft is designated as NORDO, it signifies that the pilot cannot communicate verbally with air traffic control and must rely on visual signals or other means of navigation. By squawking 7600, the pilot effectively communicates this status, prompting ATC to provide any necessary assistance and to be more vigilant regarding the aircraft’s intentions and movements.

The other codes serve different purposes: 7700 indicates an emergency situation, while 7500 signals a hijacking situation. The code 7800 is not used in standard emergency procedures. Thus, using 7600 allows for clear communication about the specific issue of radio failure without causing unnecessary alarm or confusion among air traffic controllers.