Level Zero System

The level zero off road navigation system operates normally in 'road navigation mode' with conventional road data maps. The system functions in 'data guidance mode' giving direct point to point directions and in 'map guidance mode' giving a visual map representation of the route and terrain information. The user can select between the guidance screens. The vehicle position and proposed route is shown on the map display and is updated in real time. Arrival at a waypoint or destination is governed by the waypoint acceptance radius, which tells you when you are within a certain radius of a waypoint. This is set by the user from a list of available options. When the vehicle arrives at the waypoint or destination an audio message is given. If the route is being followed then the system provides guidance to the next waypoint of that route. At the start of guidance, but after the guidance screen has been updated, an audio message is given to confirm the type of guidance requested and to give the bearing of the waypoint or destination. As the vehicle approaches the waypoint or destination an audible warning is given to indicate that the waypoint is ahead. The language used by off road navigation is the same as that selected for road navigation.