Final answer:
The transponder codes 7500, 7600, and 7700 represent specific aviation emergency situations: hijacking, radio failure, and general emergency respectively.
Therefore, the correct answer is: option a) 7500 - Hijack, 7600 - Radio Failure, 7700 - Emergency.
Step-by-step explanation:
A discrete transponder code (often called a squawk code) is assigned by air traffic controllers to identify an aircraft uniquely in a flight information region (FIR). This allows easy identification of aircraft on radar.
It is an international standard aviation emergency codes, used to indicate specific emergency situations to air traffic control and are known as 'squawk' codes.
The correct meanings of the transponder codes are:
- 7500 - Squawking 7500 signifies an aircraft being hijacked and could result in an aircraft being escorted by military forces.
- 7600 - 7600 is the squawk code reserved for aircraft that have suffered a radio communication failure.
- 7700 - A Squawk 7700 indicates an emergency. This can be an emergency of any kind. Pilots may input it into the transponder themselves – or when instructed to do so by ATC.
To answer the question provided, the correct option is: a) 7500 - Hijack, 7600 - Radio Failure, 7700 - Emergency