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Method and system for determining the position of marine vessels and similar objects

  • US 7,315,274 B2
  • Filed: 03/15/2005
  • Issued: 01/01/2008
  • Est. Priority Date: 03/15/2004
  • Status: Active Grant
First Claim
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1. System for determining the relative position between two or more objects in a marine environment, of which at least one object can be maneuvered relative to one or more other objects, comprising:

  • at least one interrogator using frequency modulated continuous wave radar arranged on one of the objects, and at least one transponder arranged on at least one other object, the interrogator constructed and arranged to transmit a radio signal to the at least one transponder,the at least one transponder constructed and arranged to generate a different sideband frequency to introduce an identity tag into a signal to be reflected to the interrogator,a signal processing unit with software containing algorithms for determination of ranges, velocities and angles to transponders, anda fixed transponder is provided on the same object as the interrogator, for continuous self calibration and integrity monitoring.

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