Pilots' announcements, also known as ETAS (Estimated Time of Arrival and Departure), are the announcements made by pilots to inform passengers of their flight's estimated time of arrival and departure. These announcements are typically made during the pre-flight briefing and at other times throughout the flight. They provide passengers with important information about the flight, such as the expected duration, altitude, and speed. Additionally, they may include information about the weather, turbulence, and other safety-related matters.