时间：2011-04-18 00:52来源：蓝天飞行翻译 作者：航空 点击：次
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Pilot/Controller Glossary being received on the mode to which it is set to respond. (See INTERROGATOR.)(See ICAO term TRANSPONDER.)(Refer to AIM.)TRANSPONDER [ICAO]. A receiver/transmitter which will generate a reply signal upon proper interrogation; the interrogation and reply being on different frequencies. TRANSPONDER CODES. (See CODES.)TRANSPONDER OBSERVED . Phraseology used to inform a VFR pilot the aircraft’s assigned beacon code and position have been observed. Specifically, this term conveys to a VFR pilot the transponder reply has been observed and its position correlated for transit through the designated area. TRIAL PLAN. A proposed amendment which utilizes automation to analyze and display potential conflicts along the predicted trajectory of the selected aircraft. TRSA. (See TERMINAL RADAR SERVICE AREA.)TSD. (See TRAFFIC SITUATION DISPLAY.)TURBOJET AIRCRAFT. An aircraft having a jet engine in which the energy of the jet operates a turbine which in turn operates the air compressor. TURBOPROP AIRCRAFT. An aircraft having a jet engine in which the energy of the jet operates a turbine which drives the propeller. TURN ANTICIPATION. (maneuver anticipation). TVOR. (See TERMINAL-VERY HIGH FREQUENCY OMNIDIRECTIONAL RANGE STATION.)TWEB. (See TRANSCRIBED WEATHER BROADCAST.)TWO-WAY RADIO COMMUNICATIONS FAIL-URE. (See LOST COMMUNICATIONS.)PCG T.7 U UDF. (See DIRECTION FINDER.)UHF. (See ULTRAHIGH FREQUENCY.)ULTRAHIGH FREQUENCY. The frequency band between 300 and 3,000 MHz. The bank of radio frequencies used for military air/ground voice communications. In some instances this may go as low as 225 MHz and still be referred to as UHF. ULTRALIGHT VEHICLE. An aeronautical vehicle operated for sport or recreational purposes which does not require FAA registration, an airworthiness certificate, nor pilot certification. They are primarily single occupant vehicles, although some two-place vehicles are authorized for training purposes. Operation of an ultralight vehicle in certain airspace requires authorization from ATC. (Refer to 14 CFR Part 103.)UNABLE. Indicates inability to comply with a specific instruction, request, or clearance. UNASSOCIATED. A radar target that does not display a data block with flight identification and altitude information. (See ASSOCIATED.)UNDER THE HOOD. Indicates that the pilot is using a hood to restrict visibility outside the cockpit while simulating instrument flight. An appropriately rated pilot is required in the other control seat while this operation is being conducted. (Refer to 14 CFR Part 91.)UNFROZEN. The Scheduled Time of Arrival (STA) tags, which are still being rescheduled by traffic management advisor (TMA) calculations. The aircraft will remain unfrozen until the time the corresponding estimated time of arrival (ETA) tag passes the preset freeze horizon for that aircraft’s stream class. At this point the automatic rescheduling will stop, and the STA becomes “frozen.” UNICOM. A nongovernment communication facil-ity which may provide airport information at certain airports. Locations and frequencies of UNICOMs are shown on aeronautical charts and publications. (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.)PCG U.1 V 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. |
