Then, as long as the GPS is on, and can get a position reading, the user can see where the asset is at that time. However, if the GPS position in unavailable, you may be out of luck. Sometimes this feature is available even if you use automatic polling also. Passive tracking , as described above, does not transmit any real-time data. The position information is recorded and saved for download later.
Different users have different tracking needs.
The largest group of users is the trucking industry . Transcontinental and regional carriers both benefit by knowing the location of their cargo at any point in time. Most of these users require satellite tracking, unless the region is completely within the service territory of the radio, wireless or cellular network. For smaller, regional carriers, the addition of voice or pager communications can make it easier for drivers to check-in or receive new routing information. For some systems, your GPS device can also have a display with mapping and navigation information.