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The Gemini 105 offers a unique blend of multihull performance and accommodation in a manageable size and at a great price. The accommodation is spacious, light and airy as you would expect, with lots of storage and a deck saloon allowing you to watch the world go by. On deck the well thought out layout offers a stable, safe platform great for entertaining large numbers, scuba diving, windsurfing or simply sunbathing. Lifting keels and kick-up rudders allow a draft under 2ft and the 14ft beam opens up the option of the French canal system if heading for the Med. ‘Catena IV’ spent a long time laid up ashore, hence the low engine hours. She has been in her current ownership since 2018 and has been cruised around the East and South coasts.
Viewing by appointment only through our Essex office (01621) 785600.
Additional Details
Accommodation
The Gemini 105 offers up to 8 berths in four cabins with 6’5” maximum headroom and excellent stowage.
DECK SALOON: A really light and spacious saloon consisting of a large U-shaped seating area for up to 8 adults around a central table which drops to form a very large double berth. Additional stainless steel grab handrails are fitted in the saloon and stowage beneath seating adds further practicality.
MASTER FORECABIN: Located to starboard and fitted with a double berth, slatted bed-base, dressing table, mirrors, opening hatch and ample storage space in various cupboards, drawers and lockers.
GALLEY: A large linear galley in the starboard passageway, with excellent worktop space. Equipped with a LP Voyager 2-burner gas cooker with grill and oven, front opening Dometic Americana gas fridge (in saloon), twin stainless steel sinks and storage.
PORT PASSAGEWAY: A useful space with various storage cupboards and drawers, this area is very versatile and could be a great area for chart work, hobbies or extra food preparation when entertaining on board.
AFT CABINS: Aft cabins to port and starboard fitted with double berths, hanging lockers, opening portlights and further storage space.
HEADS COMPARTMENT: Forward to port is a generous heads compartment with a marine toilet (with 18 gallon holding tank), shower with folding shower screen, washbasin and storage areas.
GENERAL EQUIPMENT: Pressurised hot and cold water system via a calorifier with immersion coil and 2 x 30 gallon water tanks. Carver gas fired warm air cabin heating with ducts to all cabins and saloon. Blue upholstery. Blinds to all portholes.
EXTERNAL SPACE: The large cockpit has an extended canopy with skylights, offering protection from rain and sun. A standing helm position is located to starboard, plenty of seating is provided around the cockpit and large cockpit lockers provide lots of storage.
Mechanical Systems
Located in aft of cockpit, Westerbeke 30B3, 3-cylinder 27hp diesel engine. Freshwater cooled via heat exchanger. Single lever controls with electric start. Silette-Sonic saildrive with hydraulic lift to fixed propeller. 2 x 18 gallon plastic fuel tanks giving a range of approximately 150-200nm. Only 187 engine hours. Engine last serviced by the owner in 2019.
Electrical Systems
2 x 12v, 85 amp/hour batteries (both new 2018) charged via engine alternator. Shorepower system with ring mains and immersion coil for water heating. Electrical distribution panel with BEP battery gauge. 12v Socket. Full cabin lighting.
Sails and Spars
Masthead rigged sloop. Selden anodised aluminium deck stepped mast and boom. Stainless steel standing rigging with adjustable backstay. Terylene running rigging. Single line slab reefing with lazyjacks and stack pack. Schaefer headsail furling system. Lines led aft via jammers. 2 x Lewmar 40 self tailing sheet winches. 2 x Lewmar 7 halyard winches at mast.
Furling Genoa - 2001 - very good (serviced and laundered 2018) Deck Equipment
Assorted warps and fenders Navigation Equipment
Navigation lights Safety Equipment
This Gemini 105 MC was built in 2001 by Performance Cruising to a Tony Smith design. White GRP hull, superstructure and decks with moulded non-slip surfaces. Twin lifting keels and rudders with wheel steering. Internal joinery in teak and teak faced plywood.
DISCLAIMER
The company normally acts as brokers for the vendor who unless otherwise stated is not selling in the course of a business. Whilst every care has been taken in the preparation of these particulars the correctness is not guaranteed and they are intended as a guide only and do not constitute a part of any contract. A prospective buyer is strongly advised to check these particulars and where appropriate and at his own expense to employ a qualified marine surveyor to carry out a survey and/or to have an engine trial conducted which if conducted by us shall not imply any liability on our part.
General note on safety equipment: Any safety equipment such as liferaft, fire extinguishers and flares etc., are usually personal to the current owner(s) and if being left on board as part of the sale of a used vessel, may require routine servicing, replacement, or changing to meet a new owner’s specific needs.
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)
From BlueWaterBoats.org:
After a 2008 Pacific crossing, the owner of a Gemini exclaimed, “the catamaran hull performs flawlessly in open blue water as well as the light winds of the Kona coast … the forward stateroom is queen sized .. the main cabin seats six … plenty of height in the full head with shower.” Great sailing and lots of living space – what’s not to like?
The Gemini is the most popular cruising catamaran in the world with more than 1000 hulls manufactured over nearly 30 years. While most of those hulls are in service as coastal cruisers, many have crossed the oceans. In 2001 the owner, designer and builder of the Gemini catamaran series, Tony Smith, sailed a new Gemini 105Mc across the Atlantic Ocean for a delivery to Southampton, England topping out at 18 knots of speed (surfing down the face of heavy seas). Many more of these adventures are chronicled in the Gemini Gems magazine (print and electronic versions) or the very active Gemini Yahoo forum.
A large cockpit with wheel steering and plenty of room for an afternoon picnic greats the sailor ascending the aft stairs. A generous, hard foredeck is surrounded by a stainless pulpit for the entire bow and lifelines running along the somewhat narrow side decks. With only about 8000 pounds of displacement, anchor chain and rode need not be overly heavy. Sailing a boat with such light displacement across the ocean requires careful consideration of heeling angles and reefing. Anything above seven degrees of heel means it’s time to reduce sail.
Returning to the cockpit allows the sailor access to the interior. Starting at the same level as the cockpit sole, immediately one is greeted by a salon table that comfortably seats four and even eight in a squeeze. Descending a few steps to the left and moving forward is found the head and shower. Hot water is provided by a propane driven instant heater, like an RV or many European homes. The big advantage is that if you have water in the two 35 gallon fresh water tanks, then you can have hot water.
In the aft part of both hulls are two births. The master cabin is in the starboard hull forward, featuring a queen sized bed. There is a tremendous amount of storage for dry goods in the galley and a propane driven refrigerator (using the ammonia cycle instead of a compressor).
The Gemini is mainly driven by the roller furled genoa and somewhat small main, though many sailors add screechers, asymmetrical spinnakers and jibs to their sail lockers. Each hull has a cable driven, hand-cranked centerboard that can be completely tucked into a trunk in the hull, reducing the draft (assuming the rudders are likewise raised), or dropped three feet into the water, dramatically improving upwind performance. While most sailing and motoring can be accomplished with both boards let half-way down, the ability to adjust the boards to wind, current, sailing or anchoring conditions is one of the Gem’s great strengths.
The 105 and 105MC are driven by a 27 HP Westerbeke diesel engine driving a Sillette tilting saildrive. The saildrive is often a source of concern and maintenance is critical on the bellows.
There are three models of the Gemini, the classic (1981-1990), the 3200 and 3400 (1990-1996) and the most popular, the 105M and 105MC (1996-2012). This article focuses on the most popular model, 105M and 105MC, which differ only in details of the interior construction. The classic, 3200 and 3400 were all manufactured in Annapolis, Maryland. Recently, Performance Cruising has partnered with Hunter Marine to manufacture the 105Mc in Alacua, Florida. There are nearly always pre-owned examples of all three types on the market.
The model most likely to be used in blue water is the 105M or 105MC discussed here. For this model, the hull lines were redrawn moving the maximum beam further aft to reduce wave drag. These new hulls have a 9:1 length:beam ratio. The new hulls also have a somewhat higher static stability. The newer hull design is stiffer, increasing seaworthiness for trans-ocean cruising.
The hull is solid GRP, laminated from woven roving and mat with isophthalic polyester resin. An outer layer of polyester resin and gel coat protects against osmosis. The decks and cockpit sole are GRP sandwich with balsa wood core.
» A review of the Gemini 105M by John Kretschmer, Sailing Magazine, Aug 1999
» Chesapeake Bay Magazine’s review of the Gemini 105Mc
Original article submitted by Robert Malkin.
This listing is presented by MultihullCompany.com. Visit their website for more information or to contact the seller.
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