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MOCA / MINIMUM OBSTRUCTION CLEARANCE ALTITUDE
The lowest published altitude in effect between radio fixes on VOR airways, off-airway routes, or route segments which meets obstacle clearance requirements for the entire route segment and navigational signal coverage only within 22 NM of a VOR
MORA / MINIMUM OFF-ROUTE ALTITUDE
The MORA provides reference point clearance within 10 NM of the route centerline (regardless of the route width) and end fixes.
The GRID MORA provides reference point clearance within the section outlined by latitude and longitude lines
MEA / MINIMUM SAFE ENROUTE ALTITUDE
The lowest published altitude between radio-fixes that meets obstacle clearance requirements between those fixes and in many countries assures acceptable navigational signal coverage
MHA / MINIMUM HOLDING ALTITUDE
The lowest altitude prescribed for a holding pattern which assures navigation signal coverage, communications, and meets obstacle clearance requirements
MRA / MINIMUM RECEPTION ALTITUDE
The lowest altitude at which an intersection can be determined
MSA / MINIMUM SAFE ALTITUDE
Altitude depicted on an Instrument Approach Chart and identified as the minimum altitude which provides a 1000 ft obstacle clearance within a 25 NM radius from the navigational facility upon which the MSA is predicated. If the radius limit is other than 25 NM, it is stated
MAA / MAXIMUM AUTHORIZED ALTITUDE
A published altitude representing the maximum usable altitude or flight level for an airspace structure or route segment
هده التعريفات من
JEPPESEN CHART MINIMUMS
أرجؤ من الله أن الامور واضحه
والسلام عليكم ورحمة الله وبركاته