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Marine Calculators
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Hull Speed Maximum Speed of a Single-Hull Displacement Boat Hull Speed = 1.34 * (LWL)1/2 Boat Speed If your speed log is disabled, you can calculate the boat's speed by determining the time it takes for a wood chip or other floating object to pass from the bow to the stern. If you want to retrieve the object, attach a string to it. Boat Speed = (60 (sec/min) * 60 (min/hr) * length of boat in feet) / ( 6076.1 (feet/nautical mile)* seconds for chip to pass) Sail Area Displacement Ratio This ratio indicates how fast the boat is in light wind. The higher the number the faster the boat.
Sail Area Displacement Ratio = Sail Area / ( Displacement Volume )2/3 Displacement Volume in Cubic Feet = Weight in Pounds / 64
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