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maximum authorized altitude
transp.	altitude maximale autorisée
English thesaurus
maximum authorized altitude
abbr.	maa
avia., amer.	A published altitude representing the maximum usable altitude or flight level FL for an airspace structure or route segment. It is the highest altitude on a Federal airway, jet route, area navigation low or high route, or other direct route for which a minimum en route altitude MEA is designated in FAR 95 at which adequate reception of NAVAID signals is assured.