I understand that the Phantom, by default will fix its "Home" position by the first lift-off made after the system boots. is there a way to positively update the "Home" position after the initial take-off, or to artificially program in a Home position. I would like to do some flying around a harbour. This would mean lifting-off from very near to a pier's edge. I know the GPS is nothing like metre accurate, so in the event of the failsafe GoHome cutting in, I would not want the drone trying to land itself onto a potentially unsafe target, rather I would want it to head inland to a good clear area, which I might be able to program in... OK, I know - why dont I just take off from the clear area inland. Well, I am not planning on relying upon the gohome function, ideally I can catch the drone on the pier after my flight. My thoughts were, I can see there is 2.4GHz antennae on the pier, so if I lose my command telemetry due QRM, the GoHome function could then contribute to losing my drone.