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Excellent light air coastal cruiser. Perfect for skinny water like Florida and Bahamas. Lived aboard this boat for months at a time. Reasonable offers will be considered. More pics to come at flickr.com/photos/156051557@N03/
Equipment: Both screened and eisenglass cockpit enclosures. Many new spares; water and fuel pump, alternator, preformed eng hoses, many others, screacher sail. Garmin GPSmap 741xs, Sirius receiver. New double bucket Captains chair, New West Marine AGM batteries and charge controler in June 2020, EPIRB and pEPIRB both 4yr old. Honda 2000gen. Voyager2500 two burner stove. Manson Supreme SS 25lb w/70 3/8 bbb, 30 5/16 200 marked rope, 33lb Bruce w/30 chain 200 rope road, Danforth on 9 chain rope. Composting toilet with never used holding tank fully plumbed for marine toilet or your choice of new marine toilet can be installed. 10FT Walker Bay dinghy unregistered. Hammock seat. Shore power cord. 3 composite propane tanks. Solar panel.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
GEMINI 105MC is a development of the 105M with a number of interior updates. Most visibly, however, the cockpit of the 105Mc can be temporarily enclosed with either canvas or solid panels.
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