So, um, Fengist, I find it very hard to stay on the ground with my vessel. I try my best, and if the ground is level, or sloped upwards, the ship is quite comfortable at 2/3rds the speed of sound... but once you hit a bump or crest the hill, you start flying. Actually flying, like a plane. And at speed, I don't want to descend too fast, so I control the craft's flight, putting it into a downward glide. I never spend more than fifteen seconds in the air, but that equates to a bit over two kilometers. Is this okay?