In aviation, a "briefing" is a critical, standardized communication process used to ensure that all personnel involved in a flight—including pilots, cabin crew, and ground staff—are fully aware of the operational and safety details for their specific mission. There are several distinct types of briefings: Preflight Briefings for pilots (Standard, Abbreviated, or Outlook) involve gathering essential weather data, NOTAMs (Notices to Air Missions), and airport closures within six hours of departure. Crew Briefings (or "CMB" for Crew Member Briefing) occur before the first flight of the day, where the Captain discusses safety protocols, emergency procedures, and expected flight conditions with the cabin crew. Once on the aircraft, pilots perform Flight Deck Briefings (Takeoff and Approach briefings) to review specific altitudes, emergency "abort" criteria, and navigation procedures for the immediate segment. Finally, Passenger Safety Briefings are the legally mandated instructions given to travelers about seatbelts, exits, and oxygen masks. These briefings are designed to eliminate ambiguity, manage human error, and ensure a "shared mental model" of the flight's plan, which is foundational to the industry's high safety standards.