The APM Flight Controller has a "Loiter” anywhere. Just flip the toggle switch and your copter will hold its position using its GPS and altitude sensors. Return to launch. Flip a switch to have APM:Copter fly back to the launch location automatically. Automatic takeoff and landing. Just flick a switch and watch APM:Copter execute its mission completely autonomously, returning home to land by itself in front of you when it’s done.
Is it possible to have a separate remote GPS transmit its coordinates to copter, such that the copter loiters around the remote GPS, utilizes the remote GPS coordnate for “home” coordinate to “return to launch” or “automatic land”?