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Apparatus for providing a course correction signal to an electronic automatic pilot to maintain a vessel on a predetermined geographic course

  • US 4,253,149 A
  • Filed: 02/14/1979
  • Issued: 02/24/1981
  • Est. Priority Date: 02/14/1979
  • Status: Expired due to Term
First Claim
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1. An apparatus for providing a course correction signal which is suitable for combination with a heading error signal in an electronic automatic pilot, whereby the electronic automatic pilot is capable of maintaining the course of a vessel on a predetermined geographic track, said course correction signal being developed from information signals received from a geographic position locator, wherein said apparatus comprises:

  • first means responsive to said information signals for producing a first output signal that is proportional to cross-track error of the vessel comprising the direction and magnitude of any lateral separation between the actual geographic position of the vessel and said predetermined geographic track;

    second means responsive to said first output signal for producing a second output signal that is proportional to the time integral of said cross-track error; and

    third means for combining said first and said second output signals to produce said course correction signal.

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