What is the procedure for severe turbulence according to the flight protocol?

The procedure for severe turbulence as outlined in flight protocols is crucial for ensuring passenger safety. When severe turbulence occurs, the captain will announce for flight attendants and passengers to sit down and fasten their seatbelts. This directive is essential as it establishes a clear and immediate response to turbulence, prioritizing the safety and security of everyone on board.

The captain's announcement serves several purposes: it quickly communicates the severity of the situation, instructs passengers to secure themselves to avoid injury, and allows the flight attendants to take necessary safety precautions. By ensuring that all individuals are seated and belted, the risk of accidents or injuries during turbulent conditions is significantly minimized.

In contrast, other options may not adhere to the established protocols or focus on the priorities during severe turbulence. Serving drinks can be dangerous during turbulence, as it could lead to spills or injuries. Notifying only the captain is insufficient, since all crew members need to be informed and should act accordingly to manage the situation effectively. Attempting to calm all passengers might be appropriate in less critical situations, but during severe turbulence, the priority is on securing everyone’s safety, which is best achieved by ceasing service and ensuring all individuals are safely seated and belted.