What are the three portions of a rotary wing aircraft that you must avoid at all times?

The correct choice identifies the three critical areas around a rotary wing aircraft that pose significant hazards and must be avoided at all times: the main rotor blades, tail rotor blades, and cargo hook.

Understanding the dangers associated with these components is crucial for ensuring safety around helicopters. The main rotor blades are large rotating blades that create lift; coming into contact with them can lead to severe injury or fatality. Similarly, tail rotor blades serve the essential function of countering the torque effect produced by the main rotor; they spin at high speeds and are equally dangerous.

The cargo hook, used for aerial delivery and transport, can also pose risks, particularly when cargo is attached, as it can shift unexpectedly or may be affected by the rotor wash. Thus, recognizing these three specific areas and maintaining a safe distance is essential for personnel safety during operations involving rotary wing aircraft.