Range Rover P38
NAVIGATION SYSTEM
19
DESCRIPTION AND OPERATION
OFF ROAD NAVIGATION
Off road navigation builds on the technology of road
navigation to replace the hand held GPS location
devices, and to some degree, the use of paper maps.
Off Road Navigation Route Structure
The off road navigation route comprises a series of
waypoints which are followed sequentially. Direct
point to point guidance is given to the first waypoint in
the route. When the vehicle arrives at the first
waypoint guidance is given to the second waypoint in
the route. This process continues for subsequent
waypoints until the final waypoint (destination) is
reached.
The routes are stored in the non-volatile memory of
the navigation computer in the same way as the
address book is currently stored.
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.
Off Road Navigation Features
Routes
•
20 routes may be stored
•
Titles may be placed against routes (20
characters)
•
35 waypoints programmable per route
•
Waypoints of one route to be followed
sequentially
•
Routes may be copied and pasted as a new
route
•
The user may review and edit routes
•
Routes may be followed both forwards and in a
reverse direction
•
Enter route and waypoints into the system prior
to commencing a journey
•
Create a route by entering current location as
waypoint