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area minimum altitudes
transp., avia., tech. quote minime di zona
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area minimum altitude
avia., Canada The lowest altitude that may be used under instrument meteorological conditions IMC that will provide a minimum vertical clearance of 1000 ft or, in a designated mountainous region, 2000 ft, rounded up to the next 10O-ft increment, under conditions of standard temperature and pressure, above all obstacles located in the area specified. • abbreviation : AMA