Grid MORA

taildragger173

Well-Known Member
Jeppesen says that grid mora will provide terrain and obstacle clearance. I was wondering if anyone knew how much clearance you actually get? 1000 feet? Anyone?

Thanks!
 

zmiller4

Well-Known Member
Jeppesen says that grid mora will provide terrain and obstacle clearance. I was wondering if anyone knew how much clearance you actually get? 1000 feet? Anyone?

Thanks!
Jepps, like NACO/NOS/whatever they're called now, give you 1000' clearance in non-mountainous areas and 2000' in mountainous. The gov charts use a definition of "mountainous" outlined in the AIM, while Jeppesen defines "mountainous" as when the terrain exceeds 5000' msl.
 

LineUpAndWait

Well-Known Member
Per Jepp:

Grid MORA values derived by Jeppesen clear all terrain and man-made structures by 1000 feet in areas where the highest elevations are 5000 feet MSL and lower, MORA values clear all terrain and man made structures by 2000 feet in areas where the highest elevations are 5001 feet MSL or higher.

Grid MORA altitude supplied by the State Authority provides 2000 feet clearance in mountainous areas and 1000 feet in non-mountainous areas.
 
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