The ability to pilot a motorized vehicle such as a steam automotive or velocipede ( the skill of Helmsmanship would be employed to control any aerial, nautical or larger-then an -automotive-sized-terrestrial-vehicle) Poor - It practically breaks the moment you pull a single lever. Average - You can just barely steer, make it go forward, back up and you think you know where to put the water in. Good - You know how to tool around quite smartly, can fuel and coal yourself up, and even do simple repairs like tires and loose bolts. Exceptional - You regularly race on the afternoons with the local club