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Frequently Asked Questions

What is ______? (see Glossary)


GPS Technology

How does a GPS receiver determine its location?

What data is transmitted by GPS satellites?

Why does it take so long for a GPS receiver to find its starting location?



How accurate is GPS?

What factors influence GPS accuracy the most?

Why is my GPS receiver not using WAAS?


Maps, Waypoints & Points of Interest

What's the difference between a basemap and a detail map?

What's the difference between a waypoint and a point of interest?

How much memory do detail maps require?

How much memory is required for POI data?



Who owns GPS satellites?

Is there a fee for using GPS satellites?

Can GPS satellites track my location?


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