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S/V Sea Turtle is a 2004 Gemini 105Mc catamaran for sale by owner. She has been owned by only 2 owners and is a well-maintained northern boat with NO LEAKS. She was kept on the lake in Detroit from 2004-2010. We had her trucked by C&J Transport (experienced Gemini movers) to Portsmouth, NH and then sailed her home to Maine. We have sailed her summers only except for one trip to Florida and back.
We care for our boat deeply and the only reason we are selling her is to move to a slightly larger catamaran. We have delayed this move because there are so many features which the Gemini has that even larger cats do not offer: queen berth with a view of the stars, 18” draft (with boards, rudders, and drive leg up), the ability to point to 40 degrees when the boards are down, retractable drive leg and rudders (no worries about catching pots), large comfortable settee, hammock seat on the stern, gas refrigerator, awesome dinghy davit system, and, because she is 14’ wide, the ability fit in a regular slip and be hauled at the lower-cost yards. We have made improvements every year (just replaced the engine) and can share our maintenance log.
Bridgedeck: standing headroom is in U-shape seating for six to eight at the table, which can convert to a double bunk when necessary. With chart area and storage to port. Her master cabin is forward in the Starboard hull: standing headroom; double berth aft; navigation station port midship; head forward. Starboard hull: standing headroom; double berth aft; galley midship; access to master stateroom forward.
The Galley workspace is astounding. The countertop is 7’6” long x 19” wide with a 5 foot counter on opposite side, 3 drawers, and storage under surface. Double stainless steel sink with pressure hot and cold water. Propane stove with two burners, oven and broiler. Dometic front opening 3.8 cubic foot electric refrigerator w/ freezer. Galley fully equipped with dishes, utensils and cooking equipment and the cockpit includes a Barbeque.
Location: Maine offers some of the best cruising in North America and we can recommend boatyards. However, we are also available to help sail her south and/or we can recommend a reputable trucking company.
About the Gemini 105Mc: The Gemini 105Mc offers excellent value, outstanding accommodations, and solid sailing performance. It is designed for a broad range of use: owners who want a boat for weekend or a family going on the dream of a life time. For either, the Gemini is a successful design with three decades of experience in its pedigree and an active owner’s group. Specifications Builder: Performance Cruising Inc. Designer: Tony Smith Model: Gemini 105 Mc Flag: USA Year Built: 2004 Length Overall: 33’ 6” ( 10.21 m) LWL: 31’ 9” ( 9.75 m) Beam: 14’ 0” ( 4.27 m) Draft: Max Draft: 5’ 6” ( 1.52 m) / Min Draft: 1’ 6” ( .46 m) Displacement: 8600 lbs Mast height: 48’ 0” ( 14.63 m) Sails: Mainsail full batten with 2 rows of reefing points Genoa jib with Furlex roller furling, jib extender Tides Marine Strong Track System with slides Sail cover and storage bags Head room: 6 ft 1 in Cruising Speed: 6.5 Knts Max speed 9.9 knots Engine NEW remanufactured 27 hp Westerbeke 30B3 (2020) coupled to Sonic Catamaran drive Mk2 Cabins: 3 - 1 Queen / 2 full Heads: 1 AirHead composting toilet installed in 2018 Fresh Water 60 Gallons ( 227 l) Fuel Tankage 36 Gallons ( 136 l)
Boat Inventory
Accomodations:
Salon & Galley:
Cockpit:
Head:
Electronics & Navigation:
Electric:
Sails and Rigging:
Engine & Sillette drive leg:
Centerboards/Hull/Bottom:
Water:
Anchors/Deck:
Safety:
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.
This listing is presented by CatamaranSite.com. Visit their website for more information or to contact the seller.
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