时间：2011-04-18 00:52来源：蓝天飞行翻译 作者：航空 点击：次
|
CONVECTIVE SIGNIFICANT METEOROLOG-ICAL INFORMATION. (See CONVECTIVE SIGMET.)COORDINATES. The intersection of lines of reference, usually expressed in degrees/minutes/ seconds of latitude and longitude, used to determine position or location. COORDINATION FIX. The fix in relation to which facilities will handoff, transfer control of an aircraft, or coordinate flight progress data. For terminal facilities, it may also serve as a clearance for arriving aircraft. COPTER. (See HELICOPTER.)CORRECTION. An error has been made in the transmission and the correct version follows. COUPLED APPROACH. A coupled approach is an instrument approach performed by the aircraft autopilot which is receiving position information and/or steering commands from onboard navigation equipment. In general, coupled nonprecision ap-proaches must be discontinued and flown manually at altitudes lower than 50 feet below the minimum descent altitude, and coupled precision approaches must be flown manually below 50 feet AGL. Note: Coupled and autoland approaches are flown in VFR and IFR. It is common for carriers to require their crews to fly coupled approaches and autoland approaches (if certified) when the weather conditions are less than approximately 4,000 RVR. (See AUTOLAND APPROACH.)COURSE. a.The intended direction of flight in the horizontal plane measured in degrees from north. b.The ILS localizer signal pattern usually specified as the front course or the back course. PCG C.7 c. The intended track along a straight, curved, or segmented MLS path. (See BEARING.)(See INSTRUMENT LANDING SYSTEM.)(See MICROWAVE LANDING SYSTEM.)(See RADIAL.)CPDLC. (See CONTROLLER PILOT DATA LINK COMMUNICATIONS.)CPL [ICAO]. (See ICAO term CURRENT FLIGHT PLAN.)CRITICAL ENGINE. The engine which, upon failure, would most adversely affect the performance or handling qualities of an aircraft. CROSS (FIX) AT (ALTITUDE). Used by ATC when a specific altitude restriction at a specified fix is required. CROSS (FIX) AT OR ABOVE (ALTITUDE). Used by ATC when an altitude restriction at a specified fix is required. It does not prohibit the aircraft from crossing the fix at a higher altitude than specified; however, the higher altitude may not be one that will violate a succeeding altitude restriction or altitude assignment. (See ALTITUDE RESTRICTION.)(Refer to AIM.)CROSS (FIX) AT OR BELOW (ALTITUDE). Used by ATC when a maximum crossing altitude at a specific fix is required. It does not prohibit the aircraft from crossing the fix at a lower altitude; however, it must be at or above the minimum IFR altitude. (See ALTITUDE RESTRICTION.)(See MINIMUM IFR ALTITUDES.)(Refer to 14 CFR Part 91.)CROSSWIND. a. When used concerning the traffic pattern, the word means “crosswind leg.” (See TRAFFIC PATTERN.)b. When used concerning wind conditions, the word means a wind not parallel to the runway or the path of an aircraft. (See CROSSWIND COMPONENT.)CROSSWIND COMPONENT. The wind compo-nent measured in knots at 90 degrees to the longitudinal axis of the runway. CRUISE. Used in an ATC clearance to authorize a pilot to conduct flight at any altitude from the minimum IFR altitude up to and including the altitude specified in the clearance. The pilot may level off at any intermediate altitude within this block of airspace. Climb/descent within the block is to be made at the discretion of the pilot. However, once the pilot starts descent and verbally reports leaving an altitude in the block, he/she may not return to that altitude without additional ATC clearance. Further, it is approval for the pilot to proceed to and make an approach at destination airport and can be used in conjunction with: a.An airport clearance limit at locations with a standard/special instrument approach procedure. The CFRs require that if an instrument letdown to an airport is necessary, the pilot shall make the letdown in accordance with a standard/special instrument approach procedure for that airport, or b.An airport clearance limit at locations that are within/below/outside controlled airspace and with-out a standard/special instrument approach procedure. Such a clearance is NOT AUTHORIZA-TION for the pilot to descend under IFR conditions below the applicable minimum IFR altitude nor does it imply that ATC is exercising control over aircraft in Class G airspace; however, it provides a means for the aircraft to proceed to destination airport, descend, and land in accordance with applicable CFRs governing VFR flight operations. Also, this provides search and rescue protection until such time as the IFR flight plan is closed. (See INSTRUMENT APPROACH PROCEDURE.)CRUISE CLIMB. A climb technique employed by aircraft, usually at a constant power setting, resulting in an increase of altitude as the aircraft weight decreases. CRUISING ALTITUDE. An altitude or flight level maintained during en route level flight. This is a constant altitude and should not be confused with a cruise clearance. (See ALTITUDE.)(See ICAO term CRUISING LEVEL.)CRUISING LEVEL. (See CRUISING ALTITUDE.)CRUISING LEVEL [ICAO]. A level maintained during a significant portion of a flight. PCG C.8 CT MESSAGE. An EDCT time generated by the ATCSCC to regulate traffic at arrival airports. Normally, a CT message is automatically transferred from the Traffic Management System computer to the NAS en route computer and appears as an EDCT. In the event of a communication failure between the TMS and the NAS, the CT message can be manually entered by the TMC at the en route facility. CTA. (See CONTROLLED TIME OF ARRIVAL.)(See ICAO term CONTROL AREA.)CTAF. (See COMMON TRAFFIC ADVISORY |
