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In our minds, the perfect Pacific Northwest coastal family cruiser and one of the most desirable small catamarans ever built. The Gemini 105MC offers a lot of fun in a family sized boat. Room on fore-deck for kids kayaks, crab traps, etc. A very fast, safe, comfortable coastal platform. Perfect for kids and pets. Although popular with live-aboards and the occasional world cruiser. Almost no heeling and extremely shallow draft allows its owners to enter waters other sailors can only see from a distance. Light and airy, the interior offers generous space and storage for a boat of this size with 360 degrees of visibility from the salon. One feature rarely mentioned - in a marina, because the rudders and saildrive are linked to the wheel, she backs up and parks like a car! No docking drama. We have moved up to a larger boat for off-shore cruising but will always miss just how easy and fun these Gemini’s are.
No pets, no smoking and no bilge or holding tank stink (new sanitary hose, 1” vent and Tecma Quiet Flush electric toilet last year)
3 Cabin layout Can sleep 6-8. Standing headroom. No end-tie dock required. At 14’ beam, she is dockable in most regular size slips!
iceboatmarine@gmail.com
Equipment: Additional Specs, Equipment and Information:
Dimensions LOA: 34 ft Beam: 14 ft 0 in Minimum Draft: 1 ft 6 in Maximum Draft: 5 ft 6 in Displacement: 9600 lbs
Engines Total Power: 27 HP
Engine 1: Engine Brand: Westerbeke Year Built: 2007 Engine/Fuel Type: Diesel Drive Type: Stern drive Engine Power: 27 HP
Tanks Fresh Water Tanks: (60 Gallons) Fuel Tanks: (36 Gallons)
Accommodations Number of heads: 1
Hurricane SCH25 Hydronic Diesel Heater that really keeps us warm and dry as well gives us gobs of hot water for dishes and shower.
Accommodations The vessel has a large covered cockpit that offers ample seating for owners and guests. Entering the main salon there is an oversized U-shaped salon table and seating that converts to a queen berth.
In the port side hull there is a double cabin aft with hanging locker. The head is forward in the port hull with composting head, shower, molded vanity and sink.
The starboard hull has a double cabin aft, long galley mid-ships and large forward master cabin with large hanging locker and storage dresser.
Galley Galley down in starboard hull Counter 76 long x 19 wide 17 sq. ft. Double-sided counters work surface Plenty of accessible storage Double stainless steel sink Voyager propane 2 burner stove, oven and broiler Two drawers and storage are located under inboard 5 counter Refrigerator - 4 cubic foot AC/propane w/freezer Pressure water and foot pump hot/cold water 6 gal Force 10 hot water heater
Electronics and Navigation Raymarine Color chartplotter Raymarine auto pilot Raymarine wind Raymarine depth Raymarine VHF Compass
Electrical 12V and 120V main panel 30 amp battey charger
2 Group 24 batteries Balmar Smart battery monitor Battery selector switch Fireboy propane/CNG fume detector Reverse cycle air conditioning can be reinstalled if requested.
Sails, Rigging and Deck Roller furling genoa Mainsail Single spreader mast Bimini hard top Stainless steel bow pulpits Stainless steel stern handrails Swim ladder Bow seats Port/starboard, stern, steaming, tricolor, anchor and deck lights Buoyancy tanks fore and aft in each hull Unballasted asymmetrical fiberglass and cell foam centerboards Fiberglass molded transom steps Bulkhead mounted compass with cover Two large Propane tanks in vented cockpit locker with regulator and gauge Under hung, adjustable fiberglass and steel kick up rudders Lexan gray tinted windows Self-draining anchor locker and sail locker on foredeck 2 cockpit lockers 2 aft storage lockers Lifeline gates Fenders Dock Lines Mooring cleats Stainless steel hand rails on cabin top Lewmar electric windlass Rocna Vulcan anchor, braided line and 100’ Chain. Removable Captain’s chair
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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