If a pilot receives a 'FLASHING WHITE' signal, what should they do?

When a pilot receives a 'FLASHING WHITE' signal from an Air Traffic Control tower, it indicates a specific instruction that is vital for their next actions. This signal is used in the context of an aircraft that is in flight and is typically meant to instruct the pilot to return to the starting point or to proceed to the apron.

The instruction to return to the starting point signifies that the pilot should make preparations to head back to where they initially took off. This could be due to various reasons, such as weather conditions or other operational considerations. Additionally, the pilot may opt to go directly to the apron, which is an area intended for parking and servicing aircraft.

The option that includes both returning to the starting point and proceeding to the apron thus encapsulates the complete and correct course of action that the pilot should take upon receiving a flashing white signal. This dual instruction ensures that pilots are aware of the need for caution and the appropriate next steps in their flight operation.