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Ronstan WOTTAC


Line bias & sailing angle ready reckoner

  • Hand held, easy to use
  • Easily stored in a jacket pocket, buoyancy aid or hung round your neck with the lanyard supplied.
  • Reverse degree markings
  • Will predict start line bias and wind angles over the side of a boat (where bearings between the marks are known)
  • Will predict Olympic and Trapezoidal courses
  • Will predict whether a gybe or bear away set is preferred on a windward/leeward course after a wind shift


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