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仪表飞行术语 Instrument Flight Glossary

时间:2011-08-28 11:47来源:蓝天飞行翻译 作者:航空 点击:


Military training route (MTR). Airspace of de. ned vertical and lateral dimensions established for the conduct of military training at airspeeds in excess of 250 knots indicated airspeed (KIAS).
Minimum altitude. An altitude depicted on an instrument approach chart with the altitude value underscored. Aircraft are required to maintain altitude at or above the depicted value.
Minimum crossing altitude (MCA). The lowest allowed altitude at certain .xes an aircraft must cross when proceeding in the direction of a higher minimum en route altitude (MEA).
Minimum descent altitude (MDA). The lowest altitude (in feet MSL) to which descent is authorized on . nal approach, or during circle-to-land maneuvering in execution of a nonprecision approach.
Minimum en route altitude (MEA). The lowest published altitude between radio fixes that ensures acceptable navigational signal coverage and meets obstacle clearance requirements between those . xes.
Minimum obstruction clearance altitude (MOCA). The lowest published altitude in effect between radio . xes on VOR airways, off-airway routes, or route segments, which meets obstacle clearance requirements for the entire route segment and which ensures acceptable navigational signal coverage only within 25 statute (22 nautical) miles of a VOR.
Minimum reception altitude (MRA). The lowest altitude at which an airway intersection can be determined.
Minimum safe altitude (MSA). The minimum altitude depicted on approach charts which provides at least 1,000 feet of obstacle clearance for emergency use within a speci. ed distance from the listed navigation facility.
Minimum vectoring altitude (MVA). An IFR altitude lower than the minimum en route altitude (MEA) that provides terrain and obstacle clearance.
Minimums section. The area on an IAP chart that displays the lowest altitude and visibility requirements for the approach.
Missed approach. A maneuver conducted by a pilot when an instrument approach cannot be completed to a landing.
Missed approach point (MAP). A point prescribed in each instrument approach at which a missed approach procedure shall be executed if the required visual reference has not been established.
Mixed ice. A mixture of clear ice and rime ice.
MLS. See microwave landing system.
MM. Middle marker.
MOA. See military operations area.
MOCA. See minimum obstruction clearance altitude.
Mode C. Altitude reporting transponder mode.
MRA. See minimum reception altitude.
MSA. See minimum safe altitude.
MSL. See mean sea level.
MTR. See military training route.
Multi-function display (MFD). Small screen (CRT or LCD) in an aircraft that can be used to display information to the pilot in numerous configurable ways. Often an MFD will be used in concert with a Primary Flight Display.
MVA. See minimum vectoring altitude.
NACG. See National Aeronautical Charting Group.
NAS. See National Airspace System.
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