C150J
Well-Known Member
A year ago, I posted this:
http://forums.jetcareers.com/technical-talk/108842-q-route-width.html
The responses were accurate (Q-routes have 4NM on each side of centerline) , but I wanted to add some additional information that I'm mulling over:
- Per AC-90-100, Q-routes are considered "RNAV 2," which is RNP-2.
- RNP-2 requires that an aircraft can be within 2NM of its intended course 95% of the time and twice its dimension 99.999% (containment region) of the time. Hence 4NM on each side of centerline.
Also, see the links below for an additional source definition Q-route width and a general review of RNP:
Q-Routes: http://www.faa.gov/air_traffic/publications/atpubs/AIR/air2005.html
Overviews: http://www.ecacnav.com/downloads/2.4 J McGraw RNAV Status US.pdf
Edited to add: if anyone can actually find the official guidance for the "containment region," I owe you a beer. It is somewhere in DO-283A, but doesn't seem to be anywhere else.
J.
http://forums.jetcareers.com/technical-talk/108842-q-route-width.html
The responses were accurate (Q-routes have 4NM on each side of centerline) , but I wanted to add some additional information that I'm mulling over:
- Per AC-90-100, Q-routes are considered "RNAV 2," which is RNP-2.
- RNP-2 requires that an aircraft can be within 2NM of its intended course 95% of the time and twice its dimension 99.999% (containment region) of the time. Hence 4NM on each side of centerline.
Also, see the links below for an additional source definition Q-route width and a general review of RNP:
Q-Routes: http://www.faa.gov/air_traffic/publications/atpubs/AIR/air2005.html
Overviews: http://www.ecacnav.com/downloads/2.4 J McGraw RNAV Status US.pdf
Edited to add: if anyone can actually find the official guidance for the "containment region," I owe you a beer. It is somewhere in DO-283A, but doesn't seem to be anywhere else.
J.