Quest for a flight track.

I still want to know where the aircraft are going to fly. Turns out there is an exhibit that does that.

Exhibit 3-8 takes advantage of advanced features of PDFs to allow. By opening up the layer function on the left pane of the PDF reader, one can click on flight track names for each airport and overlay flight routes over the map. The PDF software I use is called Foxit and it opened the layers fine. A couple people couldn’t make the layers work so I exported each of the flight areas for LAX and put it on Dropbox.

Exhibit3-8_example

I call them flight “areas” because the layers aren’t very specific. What I want to see is the concentration along the centerline that occurs with RNAV and RNP navigation, as well as the spread. The expectation is that I would be able to visualize how the flight paths would overlay the streets.

When using satellite navigation procedures the aircraft are allowed to be 1 Nautical mile on either side of the centerline and still be considered in the procedure. RNP, which is used leading into final approach , is more precise than RNAV. According to the FAA approximately 40% of the aircraft can fly using RNAV/RNP.

Upon closer look Exhibit 3-8 does not represent satellite navigation as the widths are too wide. Below is the final portion of LAX’s IRNMN RNAV:

LAX IRNMN WEST ARR

The traffic should fly east through SMO, make a turn shortly after the 110 freeway and then head west to LAX. Exhibit 3-8 doesn’t show any routing or even directional information- it only shows everywhere that an airplane can fly. It looks like a blob. I question what purpose the FAA had in making this.