時間：2011-09-16 15:17來源：藍天飛行翻譯 作者：航空 點擊：次
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(See AIRPORT ADVISORY AREA.) LOCAL TRAFFIC- Aircraft operating in the traffic pattern or within sight of the tower, or aircraft known to be departing or arriving from flight in local practice areas, or aircraft executing practice instrument approaches at the airport. (See TRAFFIC PATTERN.) LOCALIZER- The component of an ILS which provides course guidance to the runway. (See INSTRUMENT LANDING SYSTEM.) (See ICAO term LOCALIZER COURSE.) (Refer to AIM.) LOCALIZER COURSE [ICAO]-The locus of points, in any given horizontal plane, at which the DDM (difference in depth of modulation) is zero. LOCALIZER OFFSET- An angular offset of the localizer from the runway extended centerline in a direction away from the no transgression zone (NTZ) that increases the normal operating zone (NOZ) width. An offset requires a 50 foot increase in DH and is not authorized for CAT II and CAT III approaches. LOCALIZER TYPE DIRECTIONAL AID- A NAVAID used for nonprecision instrument ap-proaches with utility and accuracy comparable to a localizer but which is not a part of a complete ILS and is not aligned with the runway. (Refer to AIM.) LOCALIZER USABLE DISTANCE- The maxi-mum distance from the localizer transmitter at a specified altitude, as verified by flight inspection, at which reliable course information is continuously received. (Refer to AIM.) LOCATOR [ICAO]- An LM/MF NDB used as an aid to final approach. Note: A locator usually has an average radius of rated coverage of between 18.5 and 46.3 km (10 and 25 NM). LONG RANGE NAVIGATION- (See LORAN.) LONGITUDINAL SEPARATION- The longitudi-nal spacing of aircraft at the same altitude by a minimum distance expressed in units of time or miles. (See SEPARATION.) (Refer to AIM.) LORAN- An electronic navigational system by which hyperbolic lines of position are determined by measuring the difference in the time of reception of synchronized pulse signals from two fixed transmit-ters. Loran A operates in the 1750‐1950 kHz frequency band. Loran C and D operate in the 100‐110 kHz frequency band. (Refer to AIM.) LOST COMMUNICATIONS- Loss of the ability to communicate by radio. Aircraft are sometimes referred to as NORDO (No Radio). Standard pilot procedures are specified in 14 CFR Part 91. Radar controllers issue procedures for pilots to follow in the event of lost communications during a radar approach when weather reports indicate that an aircraft will likely encounter IFR weather conditions during the approach. (Refer to 14 CFR Part 91.) (Refer AIM.) LOW ALTITUDE AIRWAY STRUCTURE- The network of airways serving aircraft operations up to but not including 18,000 feet MSL. (See AIRWAY.) (Refer to AIM.) LOW ALTITUDE ALERT, CHECK YOUR ALTI-TUDE IMMEDIATELY- (See SAFETY ALERT.) LOW ALTITUDE ALERT SYSTEM-An auto-mated function of the TPX‐42 that alerts the controller when a Mode C transponder equipped aircraft on an IFR flight plan is below a predetermined minimum safe altitude. If requested by the pilot, Low Altitude Alert System monitoring is also available to VFR Mode C transponder equipped aircraft. |
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