On airways, separation must be maintained from obstacles and terrain within XX Nm either side of track XX Nm beyond reporting points?
XX = 10Nm
Off airways, separation must be maintained from obstacles and terrain within XX Nm?
XX = 20Nm
Grid MORA vertical clearance?
1000ft clearance with elev 5000ft or below.
2000ft clearance with elev above 5000ft.
MRA
MRA on OFP provide obstacle clearance 10 NM either side of centreline and beyond the end points.
1000ft clearance with elev 5000ft or below.
2000ft clearance with elev above 5000ft.
Minimum MRA value is 2000ft.
Wind Corrections to Safe Altitude?