MORA (aviation)

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There are two types of Minimum Off Route Altitudes (MORAs) – one is called a route MORA and the other is the grid MORA.

Route MORAs provided an obstacle clearance within 10 nautical miles on both sides of the airways and within a 10-nautical mile radius around the ends of the airways.

Grid MORAs provide an obstacle clearance altitude within a latitude and longitude grid block, usually of one degree by one degree.

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