There are two types of GPS Tracking Systems:

a. Real Time tracking systems: This type of system will collect the
information of the vehicle and send it immediately or every 30 seconds
to the servers that will process the information. This type of system is
ideal when it is a priority to have an on-line, instant control of the
vehicles activities.
b. Passive tracking systems: This type of system will collect the
information of the vehicle and store in the memory of the GPS device. It
is ideal for those cases when requirements are less strict.