DA/H
Descent Altitude / Height
MAA
Maximum Authorized Altitude
MCA
Minimum Crossing Altitude
MDA/H
Minimum Descent Altitude / Height
MEA
Minimum En Route Altitude
Assures navigation coverage and 1000' (non mountainous terrain) or 2000' (mountainous) obstacle clearance.
MOCA
Minimum Obstruction Clearance Altitude
Provides navigational coverage and obstacle clearance within 22 NM of the NAVAID.
MORA
Minimum Off-Route Altitude
MRA
Minimum Reception Altitude
MVA
Minimum Vectoring Altitude
OROCA
Off-Route Obstruction Clearance Altitude
Assures obstacle clearance within 4NM of course. 1000' over non-mountainous terrain; 2000' over mountainous terrain.