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13. Background Information
About Global Positioning Satellites (GPS)
Operational since 1990, 24 satellites orbit the earth at a height of 11,000 miles. At any
given point on the globe, at least 4 satellites are in view at any one time. Using
sophisticated aerials and triangulation techniques, units such as ROAD ANGEL
Navigator 9000 are able to compute your position to within 5-10 metres. ROAD ANGEL
Navigator 9000 is equipped with a Sirf3 chipset, which enables fast and deep GPS signal
search capabilities.
Occasionally, when roads are close together, ROAD ANGEL Navigator 9000 may place
you on the wrong road. If this happens, keep driving and the device will automatically
correct itself when it has a better fix or when the road network simplifies.
ROAD ANGEL Navigator 9000 may lose the GPS satellite signal temporarily owing to
tunnels, tall buildings, bridges, dense foliage or adverse weather conditions. When you
are clear of the obstruction, ROAD ANGEL Navigator 9000 should re-acquire satellite
signals in a few seconds.
The ROAD ANGEL Database
ROAD ANGEL Navigator 9000 uses a database of Police, Local Authority and Ministry of
Transport designated danger spots, including accident black spots and safety camera
locations, primary schools and congestion charging zones. Using the latest Global
Positioning Satellite (GPS) technology, ROAD ANGEL Navigator 9000 compares your
position with known danger spot locations and gives you an audible and visual warning
as you approach them.
It is critical to the accurate operation of your ROAD ANGEL Navigator 9000 that you
update your unit regularly to maintain the very latest data. With up to 100 new hazard
locations added each month, we suggest that you update your ROAD ANGEL Navigator
9000 fortnightly. If you are a high mileage driver, using unfamiliar roads, we recommend
weekly updates.
Summary of Contents for Navigator 9000
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