What is the function of the APU control panel in the cockpit?

The APU control panel in the cockpit serves the essential function of enabling pilots to monitor and adjust the operations of the Auxiliary Power Unit (APU). This panel provides critical information about the status of the APU and allows for the management of its functions, such as starting or stopping the APU and adjusting its performance parameters as needed.

By having direct access to APU operations, pilots can ensure that the auxiliary power system is functioning properly, which is vital for providing electrical power and bleed air to start the main engines and support other aircraft systems when the engines are not running. This capability plays a crucial role in aircraft readiness, especially during ground operations when the main engines are off.

While the control panel itself does not manage main engine operations, fuel distribution, or navigation data, its primary focus is on the APU, making option B the correct choice for understanding its purpose in the cockpit.