When are seat belts required to be worn in an aircraft?

The requirement to wear seat belts in an aircraft, particularly for helicopter operations, is focused on ensuring safety during critical phases of flight. The correct answer indicates that seat belts are mandatory while the aircraft is moving on the surface, as well as during the takeoff and landing phases.

This is important because these stages are when the aircraft is most vulnerable to hazards, including sudden movements or changes in position that could lead to accidents or injuries. Wearing seat belts during surface movement helps secure occupants and prevents them from being ejected or injured in the event of an unexpected incident. Similarly, during takeoff and landing, the aircraft undergoes various accelerations and decelerations, making it crucial for passengers and crew to be restrained to maintain safety.

Factors such as turbulence are indeed a consideration for wearing seat belts; however, they apply more consistently during flight as a precaution but do not encompass the broader safety measures required for all movements on the ground and during critical phases of flight.