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Tracking device

  • US 6,414,629 B1
  • Filed: 04/19/2001
  • Issued: 07/02/2002
  • Est. Priority Date: 04/19/2001
  • Status: Expired due to Fees
First Claim
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1. A tracking system comprising, in combination:

  • a target unit having a GPS receiver, a signal transmitter to send a signal including a position of the target unit, and a processor to calculate an optimal time interval for transmission of the signal; and

    a locating unit having a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing.

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