lbs
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lbs
ft
ft
ft

  • Ballast / Displacement

    37.78

    A measure of the stiffness and power of a boat. Predictes the ability of a boat to stand up to the wind.

    • [-40] : less stiff; less powerful

    • [40-] : stiffer; more powerful

    Bal./Disp. = Bal. / Disp. * 100

  • Displacement / Waterline Length

    251.46

    A measure of the ability of a boat to reach nominal hull speed.

    • [-100] : ultralight

    • [100-200] : light

    • [200-300] : moderate

    • [300-400] : heavy

    • [400-] : very heavy

    Disp./LWL = (Disp. / 2240) / (0.01 * LWL)3

  • Comfort Ratio

    22.18

    A measure of motion comfort - it allows the comparison of boats of similar size and type. Generally, the faster the motion, the more jarring/uncomfortable the ride.

    • [-20] : lightweight racing boat

    • [20-30] : coastal cruiser

    • [30-40] : moderate bluewater cruiser

    • [40-50] : heavy bluewater cruiser

    • [50-] : very heavy bluewater cruiser

    CR = Disp. / (0.65 * (0.7 * LWL + 0.3 LOA) * (Beam1.33))

  • Capsize Screening Ratio

    2.08

    A measure of the bluewater capabilities of a boat.

    • [-2] : better suited for ocean passages

    • [2-] : better suited for coastal passages

    CSF = Beam/(Disp.1/3)

  • Hull Speed

    6.83

    Hull speed, also known as displacement speed, is a rule of thumb to estimate the maximum speed a displacement hull can efficiently travel through water. It is primarily based on the length of the boat's waterline (the length of the hull at the water's surface). This concept originates from the observation that the speed of the wave created by the boat starts to limit the boat's speed once the wave's length is equal to the waterline length of the boat.

    • [-5] : slow

    • [5-] : fast

    Hull Speed = 1.34 * (Waterline Length)0.5