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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FREQUENCY.)Pilot/Controller Glossary CTAS. (See CENTER TRACON AUTOMATION SYSTEM.)CTRD. (See CERTIFIED TOWER RADAR DISPLAY.)CURRENT FLIGHT PLAN [ICAO]. The flight plan, including changes, if any, brought about by subsequent clearances. CURRENT PLAN. The ATC clearance the aircraft has received and is expected to fly. CVFP APPROACH. (See CHARTED VISUAL FLIGHT PROCEDURE APPROACH.)CWA. (See CENTER WEATHER ADVISORY and WEATHER ADVISORY.)PCG C.9 D D-ATIS. (See DIGITAL-AUTOMATIC TERMINAL INFORMATION SERVICE.)DA [ICAO]. (See ICAO Term DECISION ALTITUDE/DECISION HEIGHT.)DAIR. (See DIRECT ALTITUDE AND IDENTITY READOUT.)DANGER AREA [ICAO]. An airspace of defined dimensions within which activities dangerous to the flight of aircraft may exist at specified times. Note: The term “Danger Area” is not used in reference to areas within the United States or any of its possessions or territories. DAS. (See DELAY ASSIGNMENT.)DATA BLOCK. (See ALPHANUMERIC DISPLAY.)DEAD RECKONING. Dead reckoning, as applied to flying, is the navigation of an airplane solely by means of computations based on airspeed, course, heading, wind direction, and speed, groundspeed, and elapsed time. DECISION ALTITUDE/DECISION HEIGHT [ICAO]. A specified altitude or height (A/H) in the precision approach at which a missed approach must be initiated if the required visual reference to continue the approach has not been established. Note 1: Decision altitude [DA] is referenced to mean sea level [MSL] and decision height [DH] is referenced to the threshold elevation. Note 2: The required visual reference means that section of the visual aids or of the approach area which should have been in view for sufficient time for the pilot to have made an assessment of the aircraft position and rate of change of position, in relation to the desired flight path. DECISION HEIGHT. With respect to the operation of aircraft, means the height at which a decision must be made during an ILS, MLS, or PAR instrument approach to either continue the approach or to execute a missed approach. (See ICAO term DECISION ALTITUDE/DECISION HEIGHT.)DECODER. The device used to decipher signals received from ATCRBS transponders to effect their display as select codes. (See CODES.)(See RADAR.)DEFENSE VISUAL FLIGHT RULES. Rules applicable to flights within an ADIZ conducted under the visual flight rules in 14 CFR Part 91. (See AIR DEFENSE IDENTIFICATION ZONE.)(Refer to 14 CFR Part 91.)(Refer to 14 CFR Part 99.)DELAY ASSIGNMENT (DAS). Delays are distrib-uted to aircraft based on the traffic management program parameters. The delay assignment is calculated in 15.minute increments and appears as a table in Traffic Flow Management System (TFMS). DELAY INDEFINITE (REASON IF KNOWN) EXPECT FURTHER CLEARANCE (TIME). Used by ATC to inform a pilot when an accurate estimate of the delay time and the reason for the delay cannot immediately be determined; e.g., a disabled aircraft on the runway, terminal or center area saturation, weather below landing minimums, etc. (See EXPECT FURTHER CLEARANCE (TIME).)DELAY TIME. The amount of time that the arrival must lose to cross the meter fix at the assigned meter fix time. This is the difference between ACLT and VTA. DEPARTURE CENTER. The ARTCC having jurisdiction for the airspace that generates a flight to the impacted airport. DEPARTURE CONTROL. A function of an approach control facility providing air traffic control service for departing IFR and, under certain conditions, VFR aircraft. (See APPROACH CONTROL FACILITY.)(Refer to AIM.)DEPARTURE SEQUENCING PROGRAM. A program designed to assist in achieving a specified interval over a common point for departures. PCG D.1 DEPARTURE TIME. The time an aircraft becomes airborne. DESCENT SPEED ADJUSTMENTS. Speed decel-eration calculations made to determine an accurate VTA. These calculations start at the transition point and use arrival speed segments to the vertex. DESIRED COURSE. a.True. A predetermined desired course direction to be followed (measured in degrees from true north). b.Magnetic. A predetermined desired course direction to be followed (measured in degrees from local magnetic north). DESIRED TRACK. The planned or intended track between two waypoints. It is measured in degrees from either magnetic or true north. The instantaneous angle may change from point to point along the great circle track between waypoints. DETRESFA (DISTRESS PHASE) [ICAO]. The code word used to designate an emergency phase wherein there is reasonable certainty that an aircraft and its occupants are threatened by grave and imminent danger or require immediate assistance. DEVIATIONS. a.A departure from a current clearance, such as an off course maneuver to avoid weather or turbulence. b.Where specifically authorized in the CFRs and requested by the pilot, ATC may permit pilots to deviate from certain regulations. (Refer to AIM.)DF. (See DIRECTION FINDER.)DF APPROACH PROCEDURE. Used under emergency conditions where another instrument approach procedure cannot be executed. DF guidance for an instrument approach is given by ATC facilities with DF capability. (See DF GUIDANCE.)(See DIRECTION FINDER.)(Refer to AIM.)DF FIX. The geographical location of an aircraft obtained by one or more direction finders. (See DIRECTION FINDER.)DF GUIDANCE. Headings provided to aircraft by facilities equipped with direction finding equipment. These headings, if followed, will lead the aircraft to a predetermined point such as the DF station or an airport. DF guidance is given to aircraft in distress or to other aircraft which request the service. Practice DF guidance is provided when workload permits. (See DIRECTION FINDER.)(See DF FIX.)(Refer to AIM.)DF STEER. (See DF GUIDANCE.)DH. (See DECISION HEIGHT.) |
