Grid MORA & MORA?

[dueguard1]

Could someone clarify what is the difference between a MORA and a Grid MORA...are these one in the same? Also how do you distinguish the two?

 

[Andy Neill]

A route MORA is specific to that route and will give you 1000-2000 clearance above all obstacles within 10 miles of the route centerline and within 10 miles of the radius around the route endpoints.

A grid MORA gives the same clearance but over all obstacles within a latitude/longitude grid on Jepp charts or WACs as applicable.

In either case, if the obstacle is less than 5000' msl, the clearance is 1000' and 2000' otherwise.

See:
http://rrp.casa.gov.au/nprm/nprm0307osD_DRAFTac121B-01.pdf