What does the "sterile cockpit rule" require from crew-members during critical phases of flight?

The sterile cockpit rule requires crew members to refrain from nonessential activities during critical phases of flight, which typically include taxiing, takeoff, and landing. This rule is in place to minimize distractions and enhance focus on tasks necessary for safe operation during these crucial times. By limiting conversation and activities to those directly related to the flight operation, crew members can maintain a high level of situational awareness and ensure effective communication and decision-making.

This is particularly important as critical phases of flight involve heightened risks and require the pilot and crew to be fully engaged and vigilant. For instance, using the time during these phases solely for necessary operational activities helps prevent mistakes and enhances safety. Engaging in social conversations, focusing solely on navigation tasks, or communicating continuously with passengers could lead to distraction and reduced attention to flight operations, which is why such activities are not permitted under the sterile cockpit rule.