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2. SPOT Satellite Messenger - Wikipedia

   en.wikipedia.org/wiki/SPOT_Satellite_Messenger

   SPOT is a GPS tracking device that uses the Globalstar satellite network [1] to provide text messaging and GPS tracking (depending on the subscription type purchased). [ 2 ] [ 3 ] It has a coverage area that includes a large portion of the planet, with the exception of extreme northern and southern latitudes and parts of the Pacific Ocean. [ 4 ]

3. SPOT personal GPS tracker: the argonaut's lifeline - AOL

   www.aol.com/news/2007-08-07-spot-personal-gps...

   SPOT Inc. has introduced the simply-titled SPOT, which operates as a personal GPS-enabled tracking device to inform relatives, friends, and emergency personnel of your status. Among the features ...

4. Satellite emergency notification device - Wikipedia

   en.wikipedia.org/wiki/Satellite_emergency...

   SPOT does not use the 406 MHz signal nor the system of satellites. Instead, it depends on the GlobalStar satellite system. It has richer features (for instance, can send many non-emergency signals) – but it does not work in as many places as 406 MHz PLBs – for instance under dense forest canopy or steep canyons. [ 6 ]

5. Positioning system - Wikipedia

   en.wikipedia.org/wiki/Positioning_system

   Because every technology has its pros and cons, most systems use more than one technology. A system based on relative position changes like the inertial system needs periodic calibration against a system with absolute position measurement. Systems combining two or more technologies are called hybrid positioning systems. [16]

6. Satellite navigation device - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation_device

   Vehicle navigation on a personal navigation assistant Garmin eTrex10 edition handheld. A satellite navigation device or satnav device, also known as a satellite navigation receiver or satnav receiver or simply a GPS device, is a user equipment that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).

7. Electronic monitoring in the United States - Wikipedia

   en.wikipedia.org/wiki/Electronic_monitoring_in...

   GPS-based tracking system used for some individuals released from prison, jail or immigrant detention. According to a survey distributed by The Pew Charitable Trusts in December 2015, "the number of accused and convicted criminal offenders in the United States who are supervised with ankle monitors and other GPS-system electronic tracking devices rose nearly 140 percent over 10 years ...