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Positioning system

  • US 7,379,388 B2
  • Filed: 03/22/2002
  • Issued: 05/27/2008
  • Est. Priority Date: 03/22/2001
  • Status: Expired due to Term
First Claim
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1. A system to position at least one vessel or object in any aquatic environment including:

  • each said vessel or object having a respective passive receiver connected thereto;

    at least two transmitters located below the surface of said aquatic environment, and raised above the bottom of said aquatic environment, each transmitter being attached to a respective housing located at the bottom of the aquatic environement; and

    a location means to determine the position of each said transmitter;

    wherein each said transmitter transmits a signal that uniquely identifies each said transmitter and is transmitted independent of a command or interrogation signal, and said receiver on each said vessel or object receives each said signal and a calculation means determines the position of said vessel or object based on the received signals.

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