OK - I get this from the FAQ:
***"What, exactly, is represented by the flight route line on a FlightAware map?**The solid line displayed on a FlightAware map is a connected series of points between every position report received for that aircraft. Generally, we receive a position every 15-60 seconds.
The dashed line is the planned route of flight per air traffic control. Often times, a flight will deviate from the planned route due to weather, shortcuts, traffic, or other operational factors."*
My question is about the blue dashed line that appears to represent the filed routes. It frequently contains kinks, side steps and zigzags at the approaches to airports that I can’t correlate to what I file or to what airlines file. I have tried seeing if some of these zig-zags on the approach to airports represent procedures but they definitely don’t seem to.
What’s going on?