AS much as I love linking to Wiki-
Other Uses
There are plenty of applications that can be used as a tolling method...and a very accurate one at that! A few years ago the NSW government wanted to make every heavy vehicle owner pay for a GPS receiver/logger so the government could charge a toll for the use of the Pacific Hwy..also as a check to ensure the vehicle only used designated roads. the NSW police still have the intent of desiring a logger that will be admissible evidence in a court to be able to detect and prosecute speeding and driving hours enfringments without intercepting a single vehicle. All capable because of GPS.
Free kick for you, Binghi...read my first post on this thread...information...make up your own mind.
And....still number three or at least first page of a google search for ADS-B or 1090ES
bet the boys in blighty are happy about that