Aviation

Aviation

Dealing with vehicles or machines used in flight or propulsion through the air.

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Aviation > Airport

visual separation

Aviation; Air traffic control

A means used by controllers to separate aircraft operating in visual meteorolgical conditions (VMC). (a) VFR—The controller, having determined that a potential conflict exists, ...

upwind leg

Aviation; Air traffic control

A flight path parallel to the landing runway in the direction of landing.

wind direction indicator

Aviation; Air traffic control

(1) An indicator that is in the form of a truncated cone made of fabric and that is not less than 12 ft long and, at the larger end, not less than 3 ft in diameter, so constructed ...

visual approach slope indicator system (VASIS)

Aviation; Air traffic control

An approach slope indicator system consisting of four light units situated on the left side of the runway in the form of two wing bars referred to as the upwind and downwind wing ...

visual approach slope indicator systems

Aviation; Air traffic control

Aerodrome facilities, including mechanical and electro-optical devices, providing vertical visual approach slope guidance to aircraft during the approach to landing. Lighting ...

user agency

Aviation; Air traffic control

The agency, organization or military command responsible for the activity for which Class F airspace has been provided. The user agency shall be identified for Class F restricted ...

uncertainty phase

Aviation; Air traffic control

(1) Canada: Phase that begins when: (a) with the exception of an arrival report, no communication has been received from an aircraft within 30 min after the time a communication ...