What does FAR 91.105 require regarding the use of seat belts?

FAR 91.105 specifically mandates that pilots must ensure that passengers are "secured in their seats" during critical phases of flight, namely during takeoff and landing. This requirement is in place to enhance safety and minimize the risk of injury in the event of turbulence or an emergency situation. It reflects the understanding that the most vulnerable periods of flight are takeoff and landing, where the potential for sudden stops or changes in aircraft motion could occur.

While the regulation emphasizes the need for passenger restraint during these crucial phases, it does not impose a blanket requirement for all passengers to wear seat belts at all times during the flight, especially in non-critical phases like cruise. This understanding differentiates it from other potential answers that might suggest broader applications of seat belt use.