Propellant

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• Velocity: Velocity is the rate of change of an aircraft's position with respect to a frame of reference, usually the ground. It is a vector quantity, meaning it has both magnitude and direction. In aviation, velocity is typically measured in knots or ... Read More >>
• Depression: In aviation, depression refers to an area of low atmospheric pressure that is usually associated with poor weather conditions. Depressions are formed when a mass of warm air meets a mass of cold air, causing the warm air to rise and the col ... Read More >>
• Alternate Airport: An alternate airport is a designated airport to which an aircraft may proceed when it becomes either impossible or inadvisable to proceed to the intended destination. The decision to proceed to an alternate airport may be made before depart ... Read More >>