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Stability indicator for marine vessel

  • US 4,647,928 A
  • Filed: 02/06/1984
  • Issued: 03/03/1987
  • Est. Priority Date: 02/06/1984
  • Status: Expired due to Fees
First Claim
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1. A stability indicator for a marine vessel, comprising:

  • sensor means for producing a first signal having a continuously variable characteristic, such as voltage magnitude, that continuously varies in a predetermined manner as the roll angle of the vessel continuously varies, such that the instantaneous value of the roll angle may be determined by measuring the instantaneous value of said characteristic; and

    processing means including means for receiving said first signal and for repeatedly measuring said characteristic over a period of time to thereby determine a plurality of instantaneous roll angle values over the period of time, means for determining the vessel'"'"'s rolling period based on said plurality of roll angle values, and means for determining a GM value equal to the square of the vessel'"'"'s beam length times the square of the vessel'"'"'s rolling constant divided by the square of the vessel'"'"'s rolling period.

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