PILOT/CONTROLLER GLOSSARY 飛行員/管制員術(shù)語詞典

時(shí)間：2011-09-16 15:17來源：藍(lán)天飛行翻譯 作者：航空 點(diǎn)擊：次

(See AIRPORT/FACILITY DIRECTORY.)
(Refer to AIM.)
UNPUBLISHED ROUTE- A route for which no minimum altitude is published or charted for pilot use. It may include a direct route between NAVAIDs, a radial, a radar vector, or a final approach course beyond the segments of an instrument approach procedure.
(See PUBLISHED ROUTE.)
(See ROUTE.)
UNRELIABLE (GPS/WAAS)- An advisory to pilots indicating the expected level of service of the GPS and/or WAAS may not be available. Pilots must then determine the adequacy of the signal for desired use.
UPWIND LEG-
(See TRAFFIC PATTERN.)
URET-
(See USER REQUEST EVALUATION TOOL.)
URGENCY- A condition of being concerned about safety and of requiring timely but not immediate assistance; a potential distress condition.
(See ICAO term URGENCY.)
URGENCY [ICAO]- A condition concerning the safety of an aircraft or other vehicle, or of person on board or in sight, but which does not require immediate assistance.
USAFIB-
(See ARMY AVIATION FLIGHT INFORMATION BULLETIN.)
USER REQUEST EVALUATION TOOL (URET)-User Request Evaluation Tool is an automated tool provided at each Radar Associate position in selected En Route facilities. This tool utilizes flight and radar data to determine present and future trajectories for all active and proposal aircraft and provides enhanced, automated flight data management.
UVDF-
(See DIRECTION FINDER.)

VASI-
(See VISUAL APPROACH SLOPE INDICATOR.)
VCOA-
(See VISUAL CLIMB OVER AIRPORT.)
VDF-
(See DIRECTION FINDER.)
VDP-
(See VISUAL DESCENT POINT.)
VECTOR- A heading issued to an aircraft to provide navigational guidance by radar.
(See ICAO term RADAR VECTORING.)
VERIFY- Request confirmation of information; e.g., “verify assigned altitude.”
VERIFY SPECIFIC DIRECTION OF TAKEOFF (OR TURNS AFTER TAKEOFF)- Used by ATC to ascertain an aircraft's direction of takeoff and/or direction of turn after takeoff. It is normally used for IFR departures from an airport not having a control tower. When direct communication with the pilot is not possible, the request and information may be relayed through an FSS, dispatcher, or by other means.
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)

VERTEX- The last fix adapted on the arrival speed segments. Normally, it will be the outer marker of the runway in use. However, it may be the actual threshold or other suitable common point on the approach path for the particular runway configura-tion.
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.

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