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单词 Minimum crossing altitude
释义

Minimum crossing altitude

英语百科

Minimum crossing altitude

Illustration showing how MCA is determined

In aviation, a minimum crossing altitude, or MCA, is the lowest altitude at which a navigational fix can be crossed when entering or continuing along an airway that will allow an aircraft to clear all obstacles while carrying out a normal climb to the required minimum en route IFR altitude (MEA) of the airway in question beyond the fix.

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