TRACKER developed and implemented the use of Very High Frequency (VHF) location technology in all tracking units. This addresses the problem of signal jamming that can affect GPS and GSM systems to ensure jammers cannot disable TRACKER units.
VHF technology also aids location of concealed vehicles and is effective at finding even those hidden in shipping containers, lock-ups or underground car parks where GPS tracking can struggle.
Global Positioning System (GPS) is a satellite navigation system providing location and time information anywhere where there is an unobstructed line of sight to four or more GPS satellites.
GSM (Global System for Mobile Communications), is a standard set developed by the European Telecommunications Standards Institute (ETSI) to describe technologies for second generation (2G) digital cellular networks.