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approach path for the particular runway configuration.
VERTEX TIME OF ARRIVAL- A calculated time of
aircraft arrival over the adapted vertex for the runway
configuration in use. The time is calculated via the
optimum flight path using adapted speed segments.
VERTICAL NAVIGATION (VNAV)– A function of
area navigation (RNAV) equipment which calculates,
displays, and provides vertical guidance to a profile
or path.
VERTICAL SEPARATION- Separation established
by assignment of different altitudes or flight levels.
(See SEPARATION.)
(See ICAO term VERTICAL SEPARATION.)
VERTICAL SEPARATION [ICAO]- Separation
between aircraft expressed in units of vertical
distance.
VERTICAL TAKEOFF AND LANDING AIRCRAFT-
Aircraft capable of vertical climbs and/or
descents and of using very short runways or small
areas for takeoff and landings. These aircraft include,
but are not limited to, helicopters.
(See SHORT TAKEOFF AND LANDING
AIRCRAFT.)
VERY HIGH FREQUENCY- The frequency band
between 30 and 300 MHz. Portions of this band, 108
to 118 MHz, are used for certain NAVAIDs; 118 to
136 MHz are used for civil air/ground voice
communications. Other frequencies in this band are
used for purposes not related to air traffic control.
VERY HIGH FREQUENCY OMNIDIRECTIONAL
RANGE STATION-
(See VOR.)
VERY LOW FREQUENCY- The frequency band
between 3 and 30 kHz.
VFR-
(See VISUAL FLIGHT RULES.)
VFR AIRCRAFT- An aircraft conducting flight in
accordance with visual flight rules.
(See VISUAL FLIGHT RULES.)
VFR CONDITIONS- Weather conditions equal to
or better than the minimum for flight under visual
flight rules. The term may be used as an ATC
clearance/instruction only when:
a. An IFR aircraft requests a climb/descent in
VFR conditions.
b. The clearance will result in noise abatement
benefits where part of the IFR departure route does
not conform to an FAA approved noise abatement
route or altitude.
c. A pilot has requested a practice instrument
approach and is not on an IFR flight plan.
Note:All pilots receiving this authorization must
comply with the VFR visibility and distance from
cloud criteria in 14 CFR Part 91. Use of the term
does not relieve controllers of their responsibility to
separate aircraft in Class B and Class C airspace
or TRSAs as required by FAAO JO 7110.65. When
Pilot/Controller Glossary 2/14/08
PCG V-2
used as an ATC clearance/instruction, the term
may be abbreviated “VFR;” e.g., “MAINTAIN
VFR,” “CLIMB/DESCEND VFR,” etc.
VFR FLIGHT-
(See VFR AIRCRAFT.)
VFR MILITARY TRAINING ROUTES- Routes
used by the Department of Defense and associated
Reserve and Air Guard units for the purpose of
conducting low‐altitude navigation and tactical
training under VFR below 10,000 feet MSL at
airspeeds in excess of 250 knots IAS.
VFR NOT RECOMMENDED- An advisory
provided by a flight service station to a pilot during
a preflight or inflight weather briefing that flight
under visual flight rules is not recommended. To be
given when the current and/or forecast weather
conditions are at or below VFR minimums. It does
not abrogate the pilot's authority to make his/her own
decision.
VFR‐ON‐TOP- ATC authorization for an IFR
aircraft to operate in VFR conditions at any
appropriate VFR altitude (as specified in 14 CFR and
as restricted by ATC). A pilot receiving this
authorization must comply with the VFR visibility,
distance from cloud criteria, and the minimum IFR
altitudes specified in 14 CFR Part 91. The use of this
term does not relieve controllers of their responsibility
to separate aircraft in Class B and Class C airspace
or TRSAs as required by FAAO JO 7110.65.
VFR TERMINAL AREA CHARTS-
(See AERONAUTICAL CHART.)
VFR WAYPOINT-
(See WAYPOINT.)
VHF-
(See VERY HIGH FREQUENCY.)
VHF OMNIDIRECTIONAL RANGE/TACTICAL
AIR NAVIGATION-
(See VORTAC.)
VIDEO MAP- An electronically displayed map on
the radar display that may depict data such as airports,
heliports, runway centerline extensions, hospital
emergency landing areas, NAVAIDs and fixes,
reporting points, airway/route centerlines, boundaries,
handoff points, special use tracks, obstructions,
prominent geographic features, map alignment
indicators, range accuracy marks, minimum vectoring
altitudes.
VISIBILITY- The ability, as determined by
atmospheric conditions and expressed in units of
distance, to see and identify prominent unlighted
　
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