Follow back function?

[vosair]

Is there any way to make your copter fly back on the path it flew for RTL? Or will it only fly back in a straight line?

[dkemxr (Dave)]

Here:
http://ardupilot.org/copter/docs/smartrtl-mode.html

[xfacta (Shawn)]

Only available in version 3.6, which is still in Release Candidate form.