During what flight phases must the seatbelts and shoulder harnesses be utilized by each crew member?

The requirement for seatbelts and shoulder harnesses to be utilized by each crew member during takeoff and landing is aligned with safety protocols designed to protect personnel in the event of sudden movements or emergencies. During these critical phases of flight, the aircraft is more susceptible to turbulence, abrupt altitude changes, or other challenging situations that could jeopardize safety.

Utilizing seatbelts and shoulder harnesses during takeoff and landing ensures that crew members are secured, minimizing the risk of injury. The takeoff phase involves acceleration and climbing, where gravitational forces can be significant, while the landing phase often includes deceleration and potential instability. Both of these moments are when crew members must be most vigilant, making the use of these safety devices essential during these operations.

The other phases of flight generally allow for more movement within the cockpit or cabin, and while safety is always a priority, the specific requirement to wear these restraints is heightened during takeoff and landing due to the increased risks involved.