9. Should seat belts be fastened throughout the flight, even when the safety belt sign is turned off?

In-flight turbulence is one of the leading causes of injuries to passengers.

Clear air turbulence can occur without warning and is caused by atmospheric pressure differences, cold or warm fronts, jet streams, mountains or thunderstorms. Turbulence may last just seconds but has contributed to many severe passenger and crew member injuries.

To best protect against injuries, it is advisable to always have your safety belt fastened while seated.