Reference
Aviation glossary
Concise definitions for aviation terminology — from METAR and NOTAM to aerodynamics and airline operations. Search directly or scan alphabetically.
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Occluded FrontAn occluded front is a weather boundary that forms when a cold front overtakes a warm front, lifting warm air completely off the surface and creating hazardous flying conditions across a wide area. Operating AirlineThe airline that physically operates a flight, providing the aircraft, crew, and all flight operations, regardless of which airline's name appears on the ticket. Outflow ValveAn outflow valve is a pressure-controlled opening in the fuselage of a pressurized aircraft that regulates cabin pressure by allowing air to escape at a controlled rate.
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