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Apparatus And Method For Heave Compensation

  • US 20070272906A1
  • Filed: 03/18/2005
  • Published: 11/29/2007
  • Est. Priority Date: 03/19/2004
  • Status: Active Grant
First Claim
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1. A load movement control system for a winch or crane system located on a vessel, the winch or crane system including a lift wire, the load movement control system comprising:

  • a) a control means to permit an operator to instruct the winch or crane system to at least raise, hold or lower the lift wire;

    b) a vessel motion detection means for detecting heave acting upon the vessel and winch or crane system;

    c) lift wire resonance prevention means for measuring and/or predicting the tension in the lift wire; and

    a control device capable of i) receiving outputs from the a) operator control means, b) vessel motion detection and c) lift wire resonance prevention means and;

    ii) controlling the winch or crane system in response to said outputs.

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