What does a transponder code of 7600 indicate?

A transponder code of 7600 specifically indicates a radio failure. This code is part of the squawk codes that pilots use to communicate their status to air traffic control (ATC) through their transponder. When an aircraft is experiencing radio failure, it squawks 7600 to alert ATC that the pilot is unable to communicate verbally. This allows air traffic controllers to understand the situation and provide appropriate assistance, such as re-routing or maintaining separation from other aircraft.

In contrast, the other options refer to different scenarios. An emergency situation would typically use 7500 or 7700, while aircraft hijacking and VFR conditions have their own distinct codes. Understanding the specific meanings tied to each transponder code is crucial for effective communication and response in aviation operations.