What kind of code can a pilot be requested to change to for Secondary Radar Identification?

A pilot can be requested to change to a specific discrete or non-discreet code for secondary radar identification primarily because these codes ensure that the aircraft is uniquely identified on radar displays. Discrete codes are assigned to individual aircraft, allowing air traffic control to track their movements without confusion from other nearby aircraft. Non-discreet codes may refer to a frequency shared by multiple aircraft, but specific codes are vital for clarity and safety in busy airspace.

Using specific codes enhances situational awareness for both pilots and air traffic controllers. These codes help to quickly distinguish each plane, which is crucial for effective coordination and communication, particularly in crowded or complex air traffic environments. The ability to identify an aircraft accurately enables air traffic control to provide appropriate instructions and ensures safety during flight operations.