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Terms for subject Aviation (1895 entries)

vehicle control service	The provision, by FSSs, of commands and instructions to control the movements of ground traffic on manoeuvring areas at designated uncontrolled aerodromes
vehicle corridor	A space delineated by parallel, 5.9-in.-wide, solid white lines spaced 24.6 ft apart to provide guidance to vehicle and equipment operators.
vented fuel	Usable fuel that is intentionally or unintentionally released while the aircraft is airborne
verification and validation	V and V	Michae­lBurov
vertical navigation	An RNAV function that calculates, displays and provides guidance to maintain a vertical profile or path. (baro-VNAV) lateral navigation (LNAV) localizer performance with vertical guidance (LPV) and
vertical rolling scissors	A defensive descending rolling maneuver in the vertical plane executed in an attempt to achieve an offensive position on the attacker
vertical separation	The separation between aircraft expressed in units of vertical distance
vertical takeoff and landing aircraft	An aircraft capable of vertical climbs and descents and of using very short runways or small areas for takeoff and landing. These aircraft include, but are not limited to, helicopters.
vertigo	The sensation of movement of the body or its surroundings which is at variance with the physical state
very high frequency	The frequency band between 30 and 300 MHz
very low frequency	The frequency band between 3 and 30 kHz
very low level operation	VLL operation	Michae­lBurov
VFR aircraft	An aircraft operated in accordance with visual flight rules
VFR control service	A service provided by ATC units including: (a) tower control; and (b) ground control
VFR flight	A flight conducted in accordance with visual flight rules
VFR holding procedure	The holding of aircraft in an orbital path around selected prominent geographical locations that can be easily recognized from the air
VFR navigation chart	An aeronautical chart (using a scale of 1:500 000) designed for visual navigation of slow- or medium- speed aircraft. Topographic information on these charts features the portrayal of relief and a judicious selection of visual checkpoints for VFR flight. Aeronautical information includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstacles, and related data.
VFR over-the-top	A VFR flight during daylight in which a pilot climbs in visual meteorological conditions (VMC) proceeds en route above inclement weather, and descends in VMC at a destination that had been forecast for conditions surpassing VMC fora period extending before and after the estimated time of arrival
VFR terminal area chart	An aeronautical chart (using a scale of 1:250 000) that depicts terminal control area (TCA) airspace, which provides for the control or segregation of all aircraft within the TCA. The chart depicts topographic information and aeronautical information, which includes visual and radio aids to navigation, airports, controlled airspace, restricted areas, obstacles, and related data.
VFR-on-top	ATC authorization for an IFR aircraft to operate in VFR conditions at any appropriate VFR altitude