Which of the following statements is true regarding the rotorcraft safety area?

The statement that the rotorcraft safety area is defined by the aircraft’s rotor diameter is true because this area is crucial for ensuring the safety of personnel and equipment in proximity to the rotorcraft. The rotor diameter is the distance from one tip of the rotor blade to the opposite tip, which determines the size of the safety area required to avoid any potential hazards from the rotor wash and the rotating blades.

Understanding this safety area is essential for the safe operation of rotorcraft, as it helps to establish a perimeter where personnel should not enter during flight operations or while rotors are in motion. Knowing that the safety area is based on the rotor diameter aids in effective communication and adherence to safety protocols.

In contrast to this correct option, the other statements are misleading. The safety area is not universally safe to enter at all times, especially when the rotors are in operation; it does not extend around the entire aircraft in a uniform manner that pertains to safety beyond just the rotor diameter; and it is specific to rotorcraft, meaning it does not apply to fixed-wing aircraft, which operate under different safety protocols.