Squawk

SQUAWK refers to the communication that comes from an aircraft's transponder — or the radio equipment that a plane has that allows it to communicate with the radar system of air traffic control on the ground.

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Affirm

Means “Yes” and usually comes after a question with “Confirm”.

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Traffic

Traffic information is information issued by an air traffic services unit to alert a pilot of other known or observed air traffic which may be in proximity to the position or intended route of flight and to help the pilot avoid a collision.

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Wilco

“Wilco” is shorthand for “will comply.” It has the same meaning when used by the military as when used by pilots or anyone with a radio. In fact, the phrase was likely created for military use.

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Direct

In the shortest possible way

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Radar contact

Radar contact means the situation which exists when the radar position of a particular aircraft is seen and identified on a situation display. ... Terrain/obstruction clearance is not provided by ATC until the controller begins to provide navigational guidance in the form of radar vectors.

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