1. An aircraft and ground-support-vehicle ground-control system including an onboard subsystem including computer structure installable in an aircraft or other vehicle, which aircraft or other vehicle also includes a spatial navigational system, a ground-control subsystem designed for selective two-way communication with said onboard subsystem, and including computer structure installable, at least in part, generally at the location of a ground-control facility located at an airport, a pre-established database structure operatively associated with said ground-control subsystem and including audio and visual-data files containing selected ground-control instructions in the forms of (a) spoken directions, and (b) visually presentable directions including (1) representational ground map and signal-light data, (2) waypoints, and (3) routes between waypoints defined, inter alia, by spatial coordinates, boundaries, and speed and direction of travel information regarding waypoints and routes, and assembly tools operatively associated with said ground-control subsystem and said database structure, employable by a ground controller to create a transmittable, full package of ground-travel instructions to an aircraft or other vehicle as a precursor to the beginning of controlled travel for that aircraft or other vehicle on the grounds of the associated airport, with such full package possessing the capability of furnishing to the crew on board such an aircraft, and/or the operator of another kind of vehicle, the only necessary ground-control discussion between a ground-controller and crew or vehicle operator.