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航空略缩语 Aviation Glossary

时间:2011-09-15 17:20来源:蓝天飞行翻译 作者:航空 点击:


LATCC London Area & Terminal Control Centre at West Drayton, near Heathrow.
lb pound(s)
lbf engine thrust in pounds force
LCD liquid crystal display
lczt (ILS) localizer (USA)
l/d ratio lift /drag ratio, a measurement of the efficiency of a wing aerofoil section
LDA landing distance available
LED light emitting diode
LF low-frequency radio waves with frequencies in the 30-300 kHz band.
LITAS low-intensity two-colour approach system.
LLTV low light level television
LLZ localizer (USA)
LOC localiser. The azimuth guidance portion of an instrument landing system.
locator medium-frequency non-directional radio beacon used as an aid to establishing yourself on final approach during an instrument landing procedure.
LOFT Line-orientated flying training. Usually on large jet simulators to prepare newly-qualified commercial pilots for multi-crew airline operations
LOM Locator outer marker
lon(g) longitude
Loran low-frequency hyperbolic radio long-range navigation system which measures time difference between reception of synchronised signals transmitted from ground transmitters. Loran-C, operates in the 100-110 kHz frequency band with an operating range of 600-1,500 nm independent of line-of-sight, and is becoming very popular among GA aircraft operators in the USA.

 
 
 
M or mag magnetic
Mach number ratio of true airspeed to the speed of sound. Mach 1 is the speed of sound at sea level, ISA, approximately 1,100 feet per second or 760 mph.
MAP missed approach point. The point on a published ILS approach expressed in time or distance from the final approach fix, or as an altitude on the glideslope, at which the missed approach procedure must be initiated if the runway or approach lights are not clearly in sight.
marker beacons (mkrs) part of an instrument landing system using 75 MHz transmitters emitting fan-shaped or elliptical signal patterns vertically upwards, defining specific points along the glideslope. The outer marker OM is situated at or near the glideslope intercept altitude of the ILS localiser, the middle marker (MM) defines a point on the glideslope at or near decision height (DH). Markers provide aural and visual indications on a cockpit marker beacon receiver.
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