GPS spreads to b u s i n e s s

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“Tracking devices can be placed on shipping containers coming into and traveling around the country. This is known as geofencing and is a prime tactic in controlling the transportation of hazardous materials. One large American port city has GPS devices installed on all the fuel tankers that commonly enter its port. If the tanker strays outside its proscribed route, a remote control system shuts off the tanker’s engines”