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2007 Gemini 105mc Catamaran for sale. “Happy Cat” has three cabin berths and sleeps up to 8 people This catamaran is perfect for a liveaboard, weekend getaways and overnight trips. One of a kind with twin Yamaha 25hp high thrust four strokes for easy maneuverability, maintenance and reliability. Meticulously looked after with many recent upgrades. Recent survey available.
Equipment: Layout & Accommodations
Queen size in master cabin 5’4” X 6’6” Double bed in each aft cabin 47” wide Settee folds out for 2 beds. All settee cushions have been reupholstered in 2018 with 4” foam and teal Sunbrella. Hammock chair fabric replaced 2017. Replaced plywood window pannel supports with Starboard panels 2020. Lots of storage
Galley
Brand new 2020 Vitrifrigo SeaClassic Refrigerator / Freezer - 4.2 cu ft Propane 4 burner stove, twin sink, tiptoe pump
Deck & Equipment
New s/s cam latches New still in box AnchorMax windlass 4 New fenders 2020 New Danforth anchor and chain 2020 Main deck Lifelines replaced 2020
Electronics & Navigation
Raymarine electronics (tridata, VHF)
Electrical, Power & Plumbing
New solar panel Hot water heater, Shower, Head Brand new Raritan toilet pump 2019 and hoses.
Engine & Mechanical
25hp Yamaha high thrust four-stroke Steering system and cables replaced 2015 Brand new starting battery and new engine battery switches 2020 Serviced annually- lower unit and engine oil and impellers changed June 2020 Daggerboard control lines and winch bolts replaced 2020 Rudder lines replaced 2019
Sails & Rigging
Standing and Running Rigging replaced 2015 Custom-built stack pack green and blue sail cover. New traveller car 2019 New Windex 2020 New mast light bulbs 2020 Rigging checked and surveyed 2020
Additional Information
New flare kit, safety gear and lifering 2020
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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