Lincoln Blackwood (2002) Navigation System [4/48] Introduction

When starting up, the navigation system may tell you: “You are leaving

the digitized area”. The displayed map will then show the vehicle

position off the road. If there are other roads in this area, the navigation

system may send inappropriate messages. This means that the system

assumes the vehicle is on one of the other roads.

• When the vehicle has been parked for a long period of time, the

navigation function may be temporarily unresponsive. The

navigation system will operate reliably again once GPS

reception is available for a few minutes.

Limited GPS reception

System performance may be adversely affected if GPS reception is

interrupted or interference occurs over a distance of several miles. The

following are possible causes for GPS reception being interrupted. If the

vehicle is:

• in multi-story parking garages,

• in tunnels and under bridges,

• in between high buildings,

• by forests or tree-lined avenues,

• in heavy rain showers and thunderstorms,

• in valleys and in mountainous regions.

The digital road map

In order to plan a route, the current car position, destination location, as

well as all the roads in between are needed. This information is available

on digital road map CDs which you insert into your navigation computer.

Real road network

Introduction