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Watercraft speed control device

  • US 7,229,330 B2
  • Filed: 02/11/2005
  • Issued: 06/12/2007
  • Est. Priority Date: 02/11/2004
  • Status: Active Grant
First Claim
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1. An apparatus for controlling the velocity magnitude of a watercraft, said apparatus comprising:

  • a GPS device capable of obtaining a measurement of the velocity magnitude of said watercraft;

    a first comparator capable of determining the velocity magnitude difference between said GPS velocity measurement and a predetermined velocity;

    a first algorithm capable of creating a first engine speed output correction from said velocity magnitude difference;

    a tachometer device capable of measuring the speed of an engine propelling said watercraft;

    a third comparator capable of summing said tachometer speed measurement and said first engine speed output correction of said first algorithm;

    a third algorithm capable of converting said sum of said tachometer speed measurement and said first engine speed output correction of said first algorithm into a first engine torque output correction, and said first engine torque output correction being capable of causing said watercraft to be propelled at substantially said predetermined velocity.

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