Sat Feb 22, 2014 9:44 pm
#1255759
Just a quick one. So, when calculating a safety height, its 1000ft + 500ft for terrain and 300ft for obstacle clearance? so MSA is 1800ft above given MSA on chart?
Or do I need to round up the given figures for obstacles and terrain too/instead?
Military Rules state "add 1000ft onto the alt of highest fixed obstacle then round up to the next 100ft" Is this the same in civvy street. I ask as Pooleys give me the impression that one always adds 1000ft for safety, and since the charts don't show terrain under 500ft, then one adds 500 ft and as the charts dont show obstacles under 300ft, then add 300ft, so basic MSA is 1800ft. Then of course you have the MSA given on the chart to add to that.
I'm confused, could someone help explain this please? Thanks
Or do I need to round up the given figures for obstacles and terrain too/instead?
Military Rules state "add 1000ft onto the alt of highest fixed obstacle then round up to the next 100ft" Is this the same in civvy street. I ask as Pooleys give me the impression that one always adds 1000ft for safety, and since the charts don't show terrain under 500ft, then one adds 500 ft and as the charts dont show obstacles under 300ft, then add 300ft, so basic MSA is 1800ft. Then of course you have the MSA given on the chart to add to that.
I'm confused, could someone help explain this please? Thanks