Aviation Word Of The Day - Clearance

 Almost every process considered vital requires of involves procedures and standard recommended practices.And flying is definitely not an exception.Pilots are not at the liberty of making their own decisions(to some extent) whenever operating a flight;since it involves invaluable lives and property.
 Clearance refers to the permission for an aircraft to proceed under specified traffic conditions.It is the point at which an aircraft is granted  or authorized to undertake a particular maneuver.
 According to the rule of the air,clearance must be obtained before the aircraft enters a controlled airspace,for instance.
 This means that pilots,in every  circumstance are to request for authorization from ATC before taking a particular action.
 In a nutshell,clearance or cleared means "to proceed as requested or instructed".It is used for both ground and air maneuvering. Pilots may only deviate from ATC clearance only in emergency situations or when compliance will threaten the safety of a flight.
Examples of clearance include cleared for take of,cleared flight planned route,cleared to taxi,cleared to descend,among many others.

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