Frequently Asked Questions
- How detailed are GPS spoken instructions?
- How do navigation systems choose a faster route?
- Do GPS maps indicate which lane to use for a turn?
- How long does GPS take to find an initial location?
- Where are GPS reception problems likely to occur?
- How does dead reckoning work?
Maps / Points of Interest
- Do navigation systems include maps for Alaska & Hawaii?
- Will my navigation system work in other countries?
- Where can I find POI data?
Installation / Mounting
- What areas are covered by TMC?
- What areas are covered by XM NavTraffic?
- Do any GPS models work with both TMC and XM NavTraffic?