Assisted GPS, generally abbreviated as A-GPS, is a system which can improve the startup performance of a GPS satellite-based positioning system. It is used extensively with GPS-capable cellular phones as its development was accelerated by the U.S. FCC's 911 mandate making the location of a cell phone available to emergency call dispatchers.
radar unit
Yes is it a secret function on every GPS.
PDA's can come with GPS technology and it works through the same function as other GPS systems, via satellite.
The overall function of a GPS does not change with colour, however, having colour to separate various aspects of the GPS screen would make it easier to use.
Yes. That's why there's one installed aboard every GPS satellite.
GPS satellites provide location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites.
When your GPS says it is off, it means that the location services on your device are disabled. You may need to enable location services in your device settings to allow the GPS to function again.
The 5530 does not appear to have an integrated gps chip. This means to use the gps function, you will have to purchase an external bluetooth gps receiver such as the Nokia LD-4w or other alternatives you will find on sites such as expansys.com, play.com or even eBay.
A TomTom GPS has features similar to every other GPS on the market. It has the main directions function, but one can also search to find interesting places, restaurants or gas stations as well.
As long as the GPS vehicle locator receives signal in Antarctica then it should function properly. You should check with the company that supplies the GPS signal and confirm they have coverage in Antarctica.
A GPS tracking device in your cell phone can be useful for locating someone who has their cell phone on but is not answering it. This would be an emergency situation.
A GPS watch doesn't function like any other GPS, unforunately. It's built to help runners track fitness data during workouts, like how far they've gone.