That would work fine, if it was an aircraft. /forums/images/graemlins/wink.gif An autonomous vehicle must have onboard intelligence to decide what to do when it encounters an obstacle. It must know how to deal with a tree in the way, a mountain, rock, or creek to avoid. How does it cross a creek? Or determine the best way around, or over, a mountain range? Knowing where it is and where it is going is the easy part. Getting between those two points with no human intervention isn't a trivial task. /forums/images/graemlins/shocked.gif