Direction is given as if to a fighter pilot.
GPSS can be used with mouse and keyboard, but can also be used with voice recognition to enable the car driver to keep his eyes on the road. More detail on this Speech Interface may be seen by clicking here. During 1997, GPSS spread rapidly overseas. In February '98 it was being used 'on the road' with at least one GPS receiver in over 70 countries. Mapping for these countries, along with the software itself, can be downloaded from this web site.