Patent ID: 8054181

Claim:
An exclusion zone compliance circuit, said circuit comprising: a terrestrial radio signal reception component configured for receiving a terrestrial radio signal, said terrestrial radio signal comprising a unique identification of a transmission source of said terrestrial radio signal; a non-volatile memory component configured for storing an encrypted data set describing boundaries of an exclusion zone; a navigation data deriving component communicatively coupled with said terrestrial radio signal reception component, said non-volatile memory, and with a data set and compares said unique identification of said transmission source with a station identification of said transmission source and a known geographic position of said transmission source, said navigation data deriving component configured for deriving a geographic position of said exclusion zone compliance circuit based upon said known geographic position of said transmission source and to determine whether said geographic position of said exclusion zone compliance circuit is located within said exclusion zone; a data blocking component communicatively coupled with said non-volatile memory component and navigation data deriving component, said data blocking component configured for controlling access of said encrypted data set; and a data control component configured for blocking output of a signal from said circuit in response to an indication that said exclusion zone compliance circuit is located within said exclusion zone.