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RNAV MINIMUM EN ROUTE ALTITUDE
RNAV MEAs are depicted on some NACO IFR en
route charts, allowing both RNAV and non-RNAV
pilots to use the same chart for instrument navigation.
MINIMUM IFR ALTITUDE
The Minimum IFR altitude (MIA) for operations is
prescribed in Part 91. These MIAs are published on
NACO charts and prescribed in Part 95 for airways and
routes, and in Part 97 for standard instrument approach
procedures. If no applicable minimum altitude is prescribed
in Parts 95 or 97, the following MIA applies: In
designated mountainous areas, 2,000 feet above the
highest obstacle within a horizontal distance of 4 NM
from the course to be flown; or other than mountainous
areas, 1,000 feet above the highest obstacle within a
horizontal distance of 4 NM from the course to be
flown; or as otherwise authorized by the Administrator
or assigned by ATC. MIAs are not flight checked for
communication.
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