It has to be done with rotors turning and the usual electrical load, so ground wheels and tow cart would be the exception.
Pick up, turn a smidgin, put it down. or on wheels, roll around a bit, stop. But it needs to be in an area free from external electrical fields, so doing it on a taxiway for example might pick up some errors from lighting cables.
The junior bograts were usually chosen, they could log command time, half of the engine time. The engineer with the Wild Datum Compass got a lot of walking time trotting around behind the machine to line up the reference points, take the reading, trot back into pilot's view, signal the next move, etc.