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PDC via AGDL
<Pre-Departure Clearence> via <Air to Ground Data Link>
-new technology available in some towers, permits the delivery of initial IFR clearences
Minimum Obstacle Clearance Altitude
-provides at least 1,000ft above obstacle, or more in mountainous regions
Minimum En-route Altitude
-provides at least 1,000ft above obstacle, or more in mountainous regions and provides acceptable signal coverage
-on all low-lovel airways/air routes
Minimum Sector Altitude
-Published on approach plates to indicate the altitude which provides 1000ft of terrain/obstacle clearance within 25NM of the indicated navaid
Minimum Reception Altitude
-Published at intersections on enroute charts when the MRA for a VHF/UHF intersection is higher than the MEA
Minimum Vectoring Altitude
-provides 1000ft of terrain/obstacle clearance and temperature corrections are already included
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