gemini 105mc catamaran review

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Gemini 105Mc

This is the third version of an already thoughtful design that tony smith has been tweaking for years. it's a spacious, stable platform for a fast-cruising couple..

Tony Smith’s most recent design is the third iteration of a 34-foot catamaran that his company, Performance Cruising, Inc., of Annapolis, first introduced to the American market in the 1990s. The result of Smith’s continued tinkering, the 105Mc, is, he says faster than the original. Since this is our first review of the Gemini cat in any version, we can’t compare. But we can report that this boat is fast for a cruising catamaran. It’s also evidence that when a builder is willing to incorporate new and sometimes expensive ideas in design development, the results can be worth the investment.

Company History Tony Smith is a British expatriate who, with wife Susan, formed Performance Cruising in 1980. Following graduation from the University of East Anglia with a degree in engineering, he studied the mechanics of boat performance while participating in singlehanded races, including the first 2,100-mile Round Britain race, in which he finished fourth.

He began his boatbuilding career by constructing a 24-foot Piver trimaran in a shed in England. Then, in 1969, he developed a method of integrating foam coring with fiberglass, and produced the Telstar, a 26-foot, folding trimaran. During a 10-year run, 300 of the boats were sold worldwide. Along the way, he also was involved in the construction of 30- to 70-foot custom yachts.

Eventually emigrating to the US, he introduced the Telstar to the US market. Following the loss of the molds in a fire in 1981, he re-emerged on the scene with the design for a new catamaran, appropriately called the Phoenix, the first Gemini.

In 1993, the company launched the Gemini 3400, the first catamaran with a lifting underhung rudder system. It was eventually modified and reintroduced as the 105M, and the 105Mc is the most recent upgrade.

With 800 boats on the water, the company claims to be the best-selling catamaran manufacturer in the US. In 2002 the company’s 20 employees built and sold 54 boats, valued at $8 million, in a 16,000-square-foot factory. An additional 25,000 square feet of production space are currently under construction.

Six dealers are located in Florida, Maryland, California and Washington. Though the company also sells directly to customers, there’s no price advantage, and a connection to a local dealer would be an advantage if warranty issues arise.

A prototype for a new Telstar trimaran is undergoing sea trials, and can be seen on the Performance Cruising website.

Appearance/Design Smith’s perspective on sailing and yacht design fits the definition of a multihull advocate. From his standpoint, sailing is about speed, comfort, and stability.

From an aesthetic standpoint, comparisons of a 35-foot catamaran to a cruising monohull are usually akin to comparing a coupe to a delivery van. Though both may be designed to accomplish the same purposes, the execution varies greatly. Many cruising multihulls present a slab-sided appearance, and boxlike profiles with cabins extending high above deck level.

The 105Mc does not. When viewed from the quarter, the Mc has a relatively sporty appearance, even with the addition of a cockpit canopy that raises the boat’s profile. Viewed on the centerline, there’s no question she’s a cat, though the unsightly strakes of the 3400 version have been eliminated.

Smith says Gemini catamarans are designed for “serious ocean cruising,” adding that “a 23-day passage with son Neil across the North Atlantic opened my eyes to her capabilities.”

During the passage, he says, the pair encountered 45-knot winds and 35-foot waves, but never felt they were in harm’s way, and were comfortably ensconced in the cockpit wearing layers of fleece.

As most readers know, voyaging in multihulls offshore demands some different sailing techniques and priorities than sailing ballasted monohulls. The high initial stability of a multihull works both ways: the boat will mightily resist capsizing, but if it does go over and invert, it will be virtually impossible to right again without the assistance of a large ship with a cargo crane. Assuming the essential integrity of the hulls, the platform will be stable, and the crew will live in an inverted world pending rescue. However, very few owners of cruising multihulls have the occasion to take their boats into conditions that seriously challenge their initial stability, and (North Atlantic deliveries by designers notwithstanding) this Mc will usually be sailed in coastal or near-coastal waters.

The Mc has the same basic dimensions as the 3400. Note that the weights published in the company’s sales literature and on its website are at odds with each other. Dimensions in this article are accurate, Smith says: “The 105M and the Mc are the same weight—9,600 pounds. We realized after our trans-Atlantic trip that the weights we had given for the 105M were too low. We finally bought a pair of scales!

“The mast on the Mc is a foot taller than the 105M, and has a 1′ crane.” The mainsail now carries a large roach and full battens, increasing mainsail area from 260 to 340 square feet, a hefty jump. The 150% genoa carries 350 square feet.

A new option is a flat-cut overlapping genoa known in the multihull world as a “screecher.” This 490-square-foot sail produces spinnaker performance without adding a pole and guys.

The furling drum for the screecher tack can move athwartships on a curved track that is mounted at the prows of both hulls and across the bowsprit/anchor platform, forward of where the anchor is dropped through. This movable tack allows more flexibility with sheeting angles, especially when attempting to work to weather.

The cut of the sail allows it to be sailed to within 50 degrees of the apparent wind, and the tack arrangement doesn’t get in the way of the ground tackle.

Smith describes the hull shapes, introduced in 1995 on the 105M model, as “revolutionary in the multihull industry.” They have a 9:1 length to width ratio.

“They closely resemble a racing monohull,” Smith says. “They are shallow and fat, with a teardrop shape to produce more speed and increase load-carrying capacity. Compared to the 3400, narrower shapes allow hulls to be moved outward to produce stability without increasing beam.”

The foredeck has 39″ of clearance at the bow. (Note that the builders refer to the deck area forward of the cabin as the “bridge deck,” but we’ll use “foredeck” as we don’t want to confuse it with the bit of decking often found between the cockpit and the companionway.)

Asymmetric centerboards were designed to reduce turbulent drag and increase lift. Constructed of a combination of fiberglass mat and Kevlar surrounding closed cell foam, they pivot upward to allow shallow-water anchoring. Located in cavities on the hulls, they are raised from inside the main saloon, a convenient arrangement that does not interfere with galley or navigational chores. Smith says the combination of hull and centerboard redesigns produced a boat requiring “25% less energy to push it the same speed.”

The cockpit sole has been lowered slightly to increase headroom to 6′ 7″. However, the modification does not impair the helmsman’s view forward through a large Lexan window that spans the deck. The wheel was moved outboard, allowing the helmsman to steer from the rail. Mainsail controls are now located on a thicker transom that provides more comfortable seating for crew, and the stern has been modified to allow access from swim ladders.

Smith’s personality is that of a consummate tinkerer. However, unlike industry giants, he enjoys the luxury of being able to continually focus his attention on one product with an eye toward evolutionary improvements.

Deck One early impression while sailing this boat is that the cockpit doesn’t resemble a spaghetti factory, though the boat is as well-equipped with name-brand equipment as a similar-sized monohull.

Halyards are led to winches on the mast rather than sheetstoppers on the cabintop because, Smith says, “you’re operating on a stable platform, even in a blow,” so moving forward is not as treacherous.

The mast carries straight double spreaders and is stepped on deck atop the main bulkhead. The headstay is opposed by a split backstay with tensioner. Halyards are internal. Shrouds are dead-ended on chainplates at the main bulkhead. The chainplates are bolted through steel strapping bonded into the foredeck area.

The mast is rigged with permanent checkstays angled 20 degrees aft. These are supported through the deck by a stainless steel rod married to a steel plate mounted horizontally in the hull. The powerful sailplan is well supported.

As is true on most catamarans, movement forward is relatively effortless. The combination of 14″ wide steps, a handhold on the canopy, a stainless steel handrail recessed in the cabintop, and 10″ wide decks, allowed us to move forward safely in blustery conditions we encountered on a test sail.

The large sundeck and plastic seats attached to the forward rail provide passengers comfortable lounging spaces forward of the mast when underway. Unlike a lightweight monohull, the cat’s performance is relatively unaffected by weight on the foredeck. Storage compartments are located in each hull.

The helmsman steers seated on a 27″ wide x 16″ deep seat that affords unrestricted views forward. We sailed with three passengers under the canopy without interfering with the skipper. Though the saloon may be enclosed in stinky weather, clear windows on the top half of the cockpit bulkhead slide open to allow the driver to commiserate with passengers.

The mainsheet is attached to the end of the boom and a section of track mounted on the stern rail that affords excellent sail control. However, the task becomes difficult when the cockpit is enclosed by a clear vinyl cover.

Lockers for storage of propane tanks and an optional generator are also located in the cockpit.

Belowdecks Step over an 11″ doorframe into the saloon and there’s no comparing the open spaces of the Mc’s 14-foot beam to the view along the saloon of a typical 34-foot monohull. That impression is augmented by a portlight array that provides 360-degree visibility, and four Bowmar hatches that allow light and air to flow in from overhead.

Fiberglass surfaces are light and shiny, and veneers nicely finished. The fit of most cabinetry is above average.

The centerpiece of the saloon is a C -shaped dining area surrounded by cushions that, with the table removed, serves as a conversation pit. When lowered, the table converts to a double berth.

The space to port, amidships along the hull, is dedicated to the navigator. The master stateroom is forward amidships and to starboard, with the bunk set at a slight angle. The head is forward to port. There’s an elongated galley on the starboard side, matched by a navigator’s station along the port side, and twin staterooms aft.

The boat has enough bunks for 6-8 adults, but Smith rightly calls it “a couple’s boat.” This is a refreshing contrast to builders who overstate the livability of their products.

In addition to its spaciousness, the minimum headroom, even in the head, is more than 6′, so most passengers will be able to stand upright.

Though the interior is not dramatically different than typical production boats, several touches contribute to a favorable impression. The dining table is solid teak. Leaves increase the surface of the table to feed 6-8 adults, and it rotates 90 degrees to fit the crowd.

Part of the navigator’s 89″ long work surface is elevated and shaped so a chart kit fits securely.

Aft staterooms have a 28″ x 28″ area in which to change clothes without banging the hull. Both have double berths and opening ports. Propane sensors and fume detectors are standard equipment in the staterooms, as are audible alarms.

The size of the galley on the Mc was increased by locating countertops on the inboard and outboard sides of the passageway, and the addition of drawers and cabinets. Similarly, room for a built-in microwave was added. The space is filled with a Voyager 2000 two-burner stove with oven and broiler, and two-section stainless steel sink. A solar vent is located overhead. The four-cubic-foot refrigerator is a Dometic American.

Skipper’s quarters are filled with light by a port spanning the hulls that presents views through black Lexan. The queen-sized berth sits on an island with nothing below it but water. Storage is forward in the hull, and in bins to starboard. The aft bulkhead of the compartment is enclosed by smoked glass that slides out of the way to provide a view corridor for the helmsman.

The head compartment on the Mc is big, bright, and well-ventilated. A good touch is a siphon arrangement that allows fresh water to be pumped through the toilet after every use, helping to eliminate odors.

Throughout the catamaran, spaces are well-organized and proportioned, so crews will rest, eat, and sleep in comfort. The skipper’s quarters are large enough to help compensate for the monthly mortgage payment and slip fees.

Construction The Gemini plant is a model of efficiency, with no wasted space, as we learned during an afternoon tour. Boats typically require 5-7 days to proceed past six stations to a forklift waiting to launch them into a creek behind the facility.

Hulls, decks, and interior liners that provide reinforcement of the structure and a base for furniture are solid fiberglass. Liners are glassed and tabbed into the hull prior to installation of the deck.

The lamination schedule calls for vinylester resins bonding a barrier coat of 1.5-oz mat followed by two layers of 18 x 15 Cofab mat. The only coring is 1/2″ end-grain balsa across the foredeck and cabintop, and in cockpit areas in which there are no deck fittings.

The hull-deck joint is a shoebox design bonded with something Smith calls “black poly putty,” produced by Cook’s. Most builders prefer 3M5200 but Smith has used the putty for 20 years because “it has an 8- hour setup time that allows workers to be more precise in the placement of the two sections. It makes a phenomenal bond that is not brittle because it is chemically cured, a better alternative than air-cured products.”

Once installed, the deck is secured with stainless steel fasteners on 5″ centers and the joint is covered by a gunwale guard.

Following his trans-Atlantic trip, Smith decided that the boat needed to undergo a weight loss program. When constructed, most boats are heavier than designed, and the Mc was no exception. Smith estimates the boat was 1,000 pounds too heavy.

“It was not a matter of speed, but of comfort,” he said. “I felt that by reducing the boat’s weight I could increase its buoyancy and produce a more comfortable ride.”

To that end, he replaced drawers in the forward stateroom with bins, substituted 1/2″ plywood for 3/4″ in some areas, and lightened the lamination in some nonload-bearing areas.

The boat’s Achilles heel could be the solving of wiring or plumbing problems, should they occur. Wiring looms are attached to the liner prior to the installation of the liner to the hull, and are virtually inaccessible. Of the arrangement, Smith says “our looms are foolproof. Remember, we’ve been doing this for 20 years and the process is evolutionary, not revolutionary.” Spare hoses are installed during construction to ease retrofitting appliances, and 12-volt wires are run through PVC to avoid heat and chafe. Wires exit the mast into the forward stateroom, and can be accessed in a panel between the deck and liner. Still, we wouldn’t want to perform subcutaneous surgery on this boat.

Performance We sailed the 105Mc on the day after the Annapolis Boat Show ended, when multihull manufacturers congregate to offer rides to interested sailors. A northeaster arrived that morning, bringing winds that built to 25-35 knots and produced a 3-4 foot chop. We were the only multi hull on the water.

With the wind abeam when we slipped dock lines, once we were underway she motored well despite her windage. On the bay, the boat sailed with little heel, and fast, under a reefed mainsail and a flat, 90% jib. Nearby, the three-person crew aboard a 30-foot monohull struggled to keep their boat on her feet.

Sailing closed-hauled, speed fluctuated between 6.5 and 7 knots. The short chop produced a bumpy ride and water over the bow, but we stayed on course with very little leeway. When we cracked off, speed fluctuated between 7 and 12 knots in wind speeds ranging from 17 to 25 knots. She was easy to steer, and responsive when we made sudden maneuvers to avoid crab pots.

The canopy protects crew from the elements, but may provide a false sense of security, as we learned when we moved forward from its protection and stepped into a chilly breeze and seaspray. Handrails are well located, and the nonskid was effective on the wet deck.

The boat is propelled under power by a single Westerbeke diesel, using an outdrive leg than can be lifted clear of the water. The current standard engine is 27-hp, up from the 20-hp engine previously installed.

Conclusions This third generation of Gemini cat is an improvement over her predecessors. She sails as well to windward as can be expected of a cruising catamaran (better than many) and shows good speed and stability off the wind. She’s easy to operate, and well-built. Spaces belowdecks are comfortable and larger than those on similar-sized monohulls, though the lack of a second head will be an inconvenience for skippers overnighting with large crews. With the 27-hp engine, a 150% genoa and furler, and electronics, the tab for the 105Mc is $129,500. Add a screecher for another $5,400.

Contact – Performance Cruising, Inc., 410/626-2720, www.geminicatamarans.com

RELATED ARTICLES MORE FROM AUTHOR

Where is the production site, and can a tour of the facility be arranged?

The boat is no longer in production. Tony retired and sold the company. I think during the 2005 market crash everything fell apart. The outdrive and engine aren’t made anymore. The new owners redesigned the boat and ruined the original idea. They tried to design a boat for the single handed rental market in the Caribbean with a deeper draft and fixed keels. It didn’t sell well.

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Gemini 105 Mc

10.5m long, beautiful accommodation, all this from a builder with recognised experience: here is the Gemini 105 Mc, a cat which is as comfortable taking you on a weekend trip, as on a sabbatical break...

Serious and strong construction; this is what has made the Gemini’s reputation.

Practical info

• Builder : GEMINI CATAMARANS
• Finance your Gemini 105 Mc
• Articles about the Gemini 105 Mc
• Available in issue # 112

Boat Test price 5.00 € Inc. tax

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The Gemini 105 Mc is a sailing cottage. Like a land cottage, it is cozy, comfortable, and sound. For multihull sailors, this 10.5 m (35 ft) catamaran gives great value in a modestly sized catamaran with a modest price to match. It is very clearly a boat design aimed at the owner, one who may want a boat for weekend and vacation cruising, or for a sailing couple on that extended cruise, the dream of a life time. For either, the Gemini is a successful design with three decades of experience in its pedigree.

The Gemini is an out-of-the-ordinary boat: in thirty years, more than 1,000 examples have been built.

The Deck Layout

The Gemini 105 Mc has a hard deck fore and aft. The bows extend about a foot beyond the fore hard deck. A foresail traveler and other sail controls occupy the space ahead of the forestay. A fiberglass deck extension forms a bowsprit that holds the anchor and is an attachment point for the forestay that holds a furling genoa. The foredeck is stepped. The step up creates space over the master berth that spans the bridge deck, and the salon. The cockpit contributes significantly to the living area on the boat. Few other catamarans of any size do so much ...

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“S/V Barefoot Gal” – Gemini 105 M Review with Carolyn of The Boat Galley

• Post author By Melissa Kalicin
• Post date January 16, 2021
• 1 Comment on “S/V Barefoot Gal” – Gemini 105 M Review with Carolyn of The Boat Galley

The other day we were lucky enough to interview Carolyn of S/V Barefoot Gal who runs the excellent website The Boat Galley which has a tremendous amount of educational content about living on a boat. Our focus was a review of her 105 M in a continuation of our series on Gemini catamaran models. Please see previous interviews on the Gemini 3200 , the Gemini 105 MC , and the Gemini 3000 .

From the salon of Barefoot Gal she talked to us about her experiences with the Gemini 105 M, how much she loves the design for coastal cruising, and how it differs from the Gemini 105 MC. We highly recommend her courses, books, and newsletter to anyone thinking of going cruising or currently living aboard.

Please watch below our interview or read the transcript of this very special edition of our series of owner interviews.

Tell us a little about yourself and S/V Barefoot Gal.

I love the boat. I have been sailing since I was 12 years old and love it. In 2002 was when we bought a cruising boat. We spent 7 years sailing a Tayana 37, a big heavy monohull in the Sea of Cortez.

We were on land for awhile due to medical problem, but in 2014 we decided to get a boat again and base ourselves out of Florida. We looked at what was going on in Florida and where we might be going – the Bahamas. Lot of shallow water.

Even remotely going back to something like the Tayana was out of it with 6 to 6′ 6″ draft. We wanted something without much draft.

We happened to go to the Annapolis boat show in 2012. We happened to see the Gemini 105 M and the MC there. It is really funny out of the brand new boats there, those were the only two boats we could imagine living on.

We knew from our previous cruising that we liked a small boat.

How long is the 105 M?

It is 34 feet. It is actually 10.5 meter which is where the 105 M comes from. It is a much lighter boat also. We have have a lighter anchor, a smaller engine, the sails are considerably smaller.

I am 61 now and my husband is 82 almost 83, so having smaller stuff to deal with is a lot easier. For anyone but particularly getting older.

When was she launched and built?

This one was 1999. She was one of the last of the 105 M’s. Consequently we have a few features of the MC’s. We have the asymetrical laminated centerboards that were brought in on the MC. That is the biggest difference. There are many other small differences, but the centerboards was the big thing we liked.

What about the centerboards makes them different from the 105 M?

On most of the M’s, the centerboards were made of marine grade plywood. If over time if not properly maintained they tend to delaminate. The new ones are made of a laminate so you don’t have that potential problem.

I shouldn’t say the M’s always have a problem with the centerboards. It is a question of maintainance.

We still have had to things like replace the centerboard line. But it is one less item on the list.

What are maintenance issues with the plywood centerboards?

Basically when do your annual haul outs, you have to constantly inspect them for signs of water intrusion and repair with West System epoxy. Make sure you are keeping paint on them. As long as you keep paint on and keeping on it, hopefully you never have to replace them.

Even if you do, there are people out there with patterns to make them.

What is the best thing about the 105 M?

Super shallow draft is very very good. At 2′ 6″ we can still motor. If we really want to go in somewhere shallow like a sandbar, we can raise the drive leg and the motor. We can actually walk it in somewhere only 18″. It is amazing.

The living space is also fantastic particularly for a couple. We ended up using the 2 aft cabins as storage. If we have guests we can put them in there. We have this beautiful big settee. I work onboard, so this is basically my office space. Having this large a space and bright and airy.

It is not the cave we had on the Tayana. It is really bright.

I mean the teak cave is beautiful is beautiful and gorgeous, but it is dark. There are trade offs between the two boats. This boat is a wonderful coastal cruiser. It is light weight. It is light inside. But the Tayana was an ocean, bluewater boat. That is what we gave up in getting this boat. It is just a case of how you want to use it as far as which boat is going to be the boat for you.

How long did you spend in the Bahamas?

Twice we have gone right around 4 months. We are hoping to go again this spring. A lot depends on Covid restrictions, vaccinations, what the restrictions are on travel in general, and our own health.

You mention you like the smallness of the boat. Is she easy to shorthand sail?

Extremely. It is very easy to do with the two of us. I actually would have no problem managing her by myself.

Last year we were coming back from the Bahamas, the day before my husband got a really nasty infection. He spent most of the time on a 36 hour trip back basically sleeping and only waking up for his medicine and a couple hour watch in the middle of the night for me.

I could manage the sail and do everything I needed by myself. That is a huge one for both of us. We want to make sure we each can feel able to sail the boat alone.

Which is basically what you do when you are double handing when the other one is off watch.

Exactly when we had the previous boat, we talked about going across the Pacific. Basically it is going to be like sleeping or singlehanding for like 30 days.

How is she in heavy weather or light weather? How does she sail?

We have had her in solid 25 knots for several hours at a time. Going downwind or very broad reach and she was excellent. No problems what so ever.

We had some short times where we higher winds with a squall. In those kind of conditions and any good size waves, I don’t think I would want to be going straight into the waves. There would be a lot of pounding in the boat. There is an issue with the bridgedeck slamming.

Any catamaran you going to get to a point where the waves are higher than the bridgedeck clearance. If you get into 6 foot waves you may not have anything above them.

That’s one thing. A lot of times we were in the Bahamas wanting to go straight into the waves and upwind, even if we are motoring we go at an angle and tack. Motor angles. Just to keep it so that we are not just getting pounding. That is hard on any boat.

How does she handle sailing into the wind?

She is not as close winded as some boats. But if we were not loaded down for cruising and full time liveaboard, I am sure she would sail another 10 to 15 degrees to the wind. But we have her loaded. This is our only home. Consequencely no boat loaded down like that sails that close to the wind.

We would all love to have one of these racing boat that sails 12 degrees to the apparent wind. That would be so nice. But the reality is we don’t have it. Either we just pick somewhere to go that is a beam reach or more. Or we decide we have to motor.

Can you tell us more about the layout down below?

It is airy and light. Wonderful. We have starboard side a large cabin forward. A full size queen bed. Pullman meaning one side is blocked off. Good storage in there.

Come back and we have the galley. Again perfectly adequate for two people. Not monstrous like you would see on a 50 foot catamaran. It is good and workable. There is good storage.

On the aft is another cabin. They call it a double but is actually 4 inches narrower that double would be. It is really like a kids bed or a single guest. Almost all the Gemini’s I know use that as a pantry area. Because when we go to the Bahamas, we take enough food for a few months. So we need enough space.

There is a similar space on the port stern. We use that for short term storage like the cushions for the cockpit. There is a really nice big long counter. That’s where Dave has all his tools. I say Dave but we share them. Good storage for that.

And then in the port bow there is a head. We changed ours to a composting head, so we could go longer. We don’t have to do a pump out. The small size of the holding tank makes it so that when you are down here really need to pump out about every four days. So we a composting head we do not need to worry about that.

And where I am sitting right now is the dining room table, settee, etc. It is a table that you can easily sit 6 at, definitely put 8 at. We have had 10 at. One was sitting not right at the table, but you can do it.

There is great ventilation. There are 4 big hatches and a couple smaller ones. And that is really important down here in Florida and Bahamas for the summer. The MC’s have built in air conditioning; the M’s do not. We did not retrofit it. But the space is there if anyone wants to put it in.

And then the other thing that we did. The boats come with a propane refrigerator. And ours had simply aged out by the time we bought it. So we put a 12V Isotherm in which because now solar power is so much better, battery life is so much better (we have lithiums now), and refrigeration is much more efficient. Having 12V is a much better deal than propane. We don’t have to go to the Bahamas and worry about taking enough propane to keep it running.

When we first started it was running through a 20 pound propane tank 12 days. That was problem in a place there was not a lot.

The Isotherm fit almost exactly in the spot. We had to trim 1/4 inch off one side. If anyone is looking at a 105 M the conversion is a really really easy conversion.

Have you done any other modifications?

We did the lithium batteries.

The M’s did not come with a cockpit enclosure. I made one for ourselves. Although I did not go to a canvas shop because it was too expensive and we don’t use it that much.

I was able to get the clear vinyl tarps that outdoor restaurants use and use tracks. That was a really big nice upgrade we did.

And we added a watermaker too. That also really makes us very self sufficient.

When we bought the boat had a DC watermaker so it ran off the batteries and solar, but it only made like 3 gallons per hour. It started having more and more problems. It was aging out. It was from 2000. After 15 years the new stuff is much better.

We put a Rainman unit in and now they make one that can be installed (not portable) and we run it off a Honda generator. It makes 30 gallons per hours. We run it once every 5 or 6 days and fill up the tanks and we are good to go.

And it was kind of nice in the Bahamas. Two boats we were sharing a lot of anchorages with did not have a watermaker. We could not fill all their needs, but we could do enough so they didn’t have to go into town quite as much.

Another feature which is not really an aftermarket, but we feel like is the dinghy davits on these boats. This one came with it. They were pretty standard, but I am not sure if every boat came with them.

We put on the radar pole also a motor lift that we could pop the outboard off. We never towed the dinghy and it was so easy.

Would you ever consider or swapping out the Gemini 105 M?

Probably not. Where we are and what we are doing, this is an absolutely wonderful boat. If I was going to cross and ocean, I probably would swap, but that is not anywhere on our timeline at this point. We are looking at staying here in Florida, going over to the Bahamas, at most maybe going to the east coast of Mexico or something. For all of these places this is a wonderful boat.

Would you like to tell us about the maneuverability of the Gemini 105 M?

Yes. One of the best things they did on the boat. First they used a steerable drive leg. Think about and inboard / outboard speed boat.

And then they tied that in with the rudders. So while there is only one engine, you have as much maneuverability as the big catamarans.

Our Tayana 37 backed like a drunken elephant. You had absolutely no idea where it was going. I like the fact on this one that I know exactly where it is going whether going to a dock or mooring.

That’s one of the best things. I expected it to be better, but I had not idea how much better it would be.

How do people get a hold of you if they are interested in your endeavors of The Boat Galley.

You can google The Boat Galley or go to www.TheBoatGalley.com . If anyone has questions on the Gemini 105M or anything else. You can email me at [email protected].

This has been fantastic and thank you for talking to us!

Well thank you. I think this is a wonderful project you have with people talking about what they like about their boats and all that.

• Tags Catamaran Interviews , Catamaran Reviews

By Melissa Kalicin

Melissa is a sailor, entrepreneur, and adventurer. In terms of multi-hulls, her heart belongs to beach cats and the Mod 70! She created a business to repurpose elite heritage sails into useful sought-after products for sailors and enthusiasts called Oceanum Vela ( www.oceanumvela.net ).

1 reply on ““S/V Barefoot Gal” – Gemini 105 M Review with Carolyn of The Boat Galley”

I bought Barefoot Gal an hope to get as much pleasure as the couple before .

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The Boat Galley

making boat life better

Our Gemini Catamaran

Published on May 18, 2015 ; last updated on June 20, 2020 by Carolyn Shearlock

We’ve had a number of questions on how we like our Gemini catamaran or how was it to go from our previous boat — a monohull Tayana 37 — to it. Here’s our listing of the pros and cons.

In a nutshell, we LOVE our Gemini catamaran for what we are now doing — two people living aboard full-time, coastal cruising in the Florida Keys and going to the Bahamas for several months at a time. But I’m not going to say it’s the perfect boat for everyone.

Okay, with that out of the way, there are a few things that we need to say:

• The Tayana 37 is a true blue water boat. The Gemini is a coastal cruiser. They are very, very different boats and designed for different purposes.
• Because of that, it’s almost impossible to truly compare them.

When we bought the Tayana ( Que Tal ), we didn’t know if we’d cross the Pacific, but thought we might (we didn’t). We wanted a boat that left the possibility open. The Tayana did well for us in the Sea of Cortez and down the coast to El Salvador, but the reality is that the Gemini would have been great, too. Probably better.

Things that we particularly like about the Gemini ( Barefoot Gal is a 105M):

• The living arrangement. It’s just a good layout for us, with a large “living room” (settee and table). The whole boat is much lighter and brighter, too. We also like the fact that the cockpit opens right into the living area, without going up and down stairs all the time. It’s also easier to get into and out of the queen berth (side entry) as opposed to the V-berth on the Tayana.
• Huge cockpit. It’s great for entertaining or even just the two of us, with room to actually walk around. The Tayana 37 has what’s referred to as an “offshore” cockpit, meaning it’s very small so that if a wave breaks into the cockpit it won’t sink the boat. But that means that it’s a very tight fit for four people. The Gemini is a much better layout for having people over. When we bought Que Tal , we underestimated how much we’d use the cockpit for things other than just steering the boat.
• Maneuverability. The Gemini is so much easier to handle in close quarters, it’s not even funny. The drive leg makes it like having an outboard, in that you steer it as well as the rudders. The Gemini is also technically 3 feet shorter than the Tayana (34 feet vs. 37) but with the Tayana’s bowsprit, it’s more like 8 or 9 feet shorter in reality. The lighter weight of the Gemini also makes it much more responsive. And any full keel boat such as the Tayana, in the words of another Tayana owner, “backs like a drunken elephant.” In other words, you don’t have a clue where it will go. Less freeboard on the Gemini also makes it easier to pick up a mooring ball both as it’s easier for the person at the helm to see it and much easier for the person at the bow to pick it up. The stress level on the Gemini as we approach a fixed object (dock, bridge, lock or even a mooring ball) is so much less than on the Tayana. The ease of getting underway/returning resulted in us going for a lot of short (1 – 2 hour) daysails. We had no idea how much this one factor would contribute to our enjoyment of the boat — and we’ve both always loved boating!
• Ease of sail handling. The Gemini’s sails are considerably smaller than the Tayana’s and the boom is much lower to the coach house roof. It is so much easier to raise/roll out the sails and stow them again, and the spinnaker is also a much more manageable size and has a larger wind range. We never wonder if it’s worth the effort to set the sails, even for a short trip. We’re not getting any younger, either (Dave is 77 and I’m 55): easier sail handling and a smaller anchor mean we’ll be able to cruise longer.
• Speed. Despite being smaller, the Gemini is considerably faster under sail and power. Our one-day range is considerably expanded. We can sail a lot more both as we move at a reasonable speed even in light winds (the drive leg pivots up out of the water easily to decrease drag) and we can afford several hours of light-air sailing and still make our intended anchorage since we typically motor at 6 knots versus 4.5 knots on the Tayana. Believe it or not, the Gemini sails slightly closer to the wind than our Tayana.
• Shallow draft. Draft was never a big issue in the Sea of Cortez or along the coast of Mexico and Central America. But it is in Florida and the Bahamas. Our Tayana theoretically drew 6 feet but loaded for cruising it was probably closer to 6½ feet. The Gemini draws about 2½ feet with the centerboards up but the drive leg and rudders down. We can go lots of places that many other boats, including a lot of catamarans, can’t. And we like to explore off the beaten path. A related factor is that our bridge clearance is just 45 feet, also giving us the freedom to go places some others can’t . . . and we have a lot less stress going under those 54 and 55 foot spans!

Bottom line is that for what we’re doing , the Gemini catamaran is just plain a fun boat. But I want to emphasize the “for what we’re doing.” Should we decide that we want to go to the Virgin Islands, we won’t have the option of going offshore — we’ll have to island hop down (yes, I know a few Geminis have gone offshore but I’ve also read their accounts).

To keep the speed and maneuverability that we like, we have to watch how much we load on board — and that means that we can’t carry as many provisions. The guest arrangements are great if one person comes, bad for more (what’s billed as a double berth is 4″ narrower than a double bed). The galley arrangement isn’t quite as good, but it’s not at all unworkable. Finally, the motion of a catamaran is different than a monohull. Not necessarily bad but it does take some getting used to if sailing in chop.

The holding tank is small at 18 gallons. After a year of cruising, we switched to a composting head ( read more about our reasons here ).

Our Gemini is an “M,” built in 1999 towards the end of the “M” series and has many features of an “MC” such as composite centerboards instead of plywood. The MC has many features that we’d like but the available ones at the time of our purchase were out of our budget.

The current model is the “Legacy” and it is totally redesigned with the interior layout changed slightly and, most importantly to us, skegs instead of centerboards. While the skegs are lower maintenance and require no effort while underway (versus having the lower a centerboard if sailing above a beam reach), we like the improved windward performance that the centerboards bring over a skeg.

Everything is a tradeoff. We are extremely glad that we decided on a Gemini as we absolutely love it. Some of the things that we love about it — such as the speed — are fairly typical of catamarans as opposed to monohulls, while other items are more specific to having a small catamaran or even to the Gemini (maneuverability).

I’ve been asked a few times if we intend to get a larger boat now that we’re going to be living aboard full time. You’ve probably already guessed that our answer is no — the Gemini catamaran is big enough for our needs and its small size leads to many of the things that we like about her. Within reason, smaller is just easier . . . and costs less too!

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Reader Interactions

Lori Steinbrunner says

May 18, 2015 at 11:26 am

Couldn’t’t agree more. We also love our Gem.

Janet Lettrich says

May 18, 2015 at 11:56 am

This was a very informative comparison. Thank you!

The Boat Galley says

May 18, 2015 at 12:04 pm

Some of the differences we expected, such as the living arrangement and the large cockpit. But we didn’t realize how much easier she’d be to “move” — whether by motor or sail. And that’s turned out to be a big part of why we love her!

May 18, 2015 at 1:00 pm

I have only ever sailed monohulls. I am looking to live aboard in the next few years. I was considering a boat like your former one for the same reasons – like leaving the possibility of ocean crossing open. Still open to all possibilities, which is why your post gave me a lot to consider. Thanks again.

Mark Sierakowski says

May 18, 2015 at 1:11 pm

Rik Dove, food for thought, if you aren’t going around the world.

Jennifer Kelly Majoros says

May 18, 2015 at 1:30 pm

We wouldn’t trade our Gem either. Love it!

Connie Watkins Weaver says

May 18, 2015 at 1:37 pm

Thanks for the accounting! Very helpful!

Mary Facker says

May 18, 2015 at 2:06 pm

How much of a factor were tramps when you picked the Gemini? I love everything about it, except for I have this dream of laying out on the trampolines, and I’m not sure I can give it up. How much do you think you’d use them if you had them?

Carolyn Shearlock says

May 18, 2015 at 4:18 pm

We’ve been on some cats with tramps (friends’ boats) and didn’t use them as much as we’d envisioned. So we didn’t really consider them (or the lack of them) in picking the Gemini. I don’t think (I may be mis-remembering) I’ve seen any of the small cats with them — they just need the space for living quarters and storage. Probably the biggest thing is that since it’s solid up from, there is more wave slap when you’re beating. We don’t find it too annoying, but some people hate it.

Bob Kimble says

March 25, 2016 at 8:13 am

I too had wanted tramps when I bought my Gem, but the hard foredeck turned out to be a blessing in disguise. It was the perfect place for morning sun salutes.

Rik Dove says

May 18, 2015 at 9:10 pm

True. And I agree with the thought. Problem is… Dikenga and I have been through so much. She is family. I could never bring myself to sell my Tayana

May 19, 2015 at 7:57 am

Sounds like a perfect boat for the Keys. We had a 30′ Iroquois for 14 years with a trampoline and while the kids loved it, it made the boat wetter going into heavy seas. I’m thinking too, now that I’m older, it wouldn’t be as stable a platform for foredeck work. We moved up to an Island Packet catamaran 8 years ago with a solid foredeck. It’s very dry( has a pod to break waves) but there is slap at anchor if there’s a heavy chop( no fun on any boat, either). What’s nice about the Gemini and Island Packet is they usually fit into a conventional slip, being 14 and 15 foot beam, respectively. The cockpit is another “room” for us. Thanks for your thoughts on your model. We sailed a Legacy last summer as a demo, but could never afford a newer one.

Mark Krajcar says

May 27, 2019 at 10:56 am

I looked at the Gem’s and ruled them out for several reasons. I did find 2 of the IpY Packet Cat 35’s for sale and a friend and I each bought one of them. I’m getting ready to head off this year, circumnavigation and would love to connect with you. Perhaps Carolyn can assist us if you’re interested.

I emailed re the name of a product you’d recommended and I couldn’t remember. You got back to me in a day! I was very surprised and happy. Thank you so much.

Judy Richterman says

May 19, 2015 at 8:56 am

What a good comparison! We’ve been living aboard our Cal 39 in the Leewards since November 2014, and I have enjoyed the luxury of space and light when I visited friends with large catamarans. It didn’t occur to me that we could find a catamaran with maneuverability and a size that would be comfortable for gunk holing in the Chesapeake and the Florida Bay. My husband got very excited by your article. You’ve planted a seed for our next stage of cruising a few years down the road.

Tim Sheahan says

May 19, 2015 at 2:16 pm

Do you have problems with stress cracks,..a friend has one and has cracks along all his shrouds and basically all around the deck, everywhere anything is bolted thru.

May 19, 2015 at 6:43 pm

The gelcoat is a problem area on the Gems. Ours is chalky and has a lot of crazing. The company swears that it’s not structural and that is how it seems on all that we’ve seen and owners we’ve talked to — not pretty but not structural.

May 19, 2015 at 7:58 pm

Right, we’re doing his this fall, just curious if it was universal.

David Ditacchio says

May 19, 2015 at 6:07 pm

After owning our Gemini 105M for 15 years, we are putting it up for sale. It has been a great boat to own and we have had many great trips with it. We will miss it and all the great Gemini sailors that we have met over the past 15 years.

Happy/sad time.

Gregory Allen says

October 26, 2015 at 12:57 am

I have been hearing about the gemini so much that for the last year I have been researching every thing about this cat and the more I read the more I am looking forward to purchasing my own. I’m in love with it and have not even chartered one yet.

December 1, 2015 at 11:30 am

We bought our Gemini 105M from PCI in 2000. It’s been a great boat and we have had 16 years of great sailing. Health issues and age are catching up with us so we are putting our boat up for sale. We are spending this winter in Cocoa Village, FL.

December 1, 2015 at 3:53 pm

Glad to hear of your many fun years aboard! It must be a tough decision to sell her . . .

April 6, 2017 at 7:37 pm

Did you end up selling it ? Looking for a 105M Joe

December 15, 2015 at 9:41 pm

I’m looking at getting a Gemini legacy 35 for a live aboard and possibly some blue water sailing. What would be the pros and cons of this type of sailing occasionally. I have 2 children that will with me so accommodations should be just right.

March 24, 2016 at 6:14 pm

Those of you who are considering a Gemini:

Have a look at the Canadian-made “Tomcat.” We looked at one at Miami Boat Show and were very impressed. Very like the Gems, yet to us, better thought out. If we were in the Gem market we’d seriously consider them.

March 24, 2016 at 6:39 pm

We saw them 2 years ago and were also impressed. However there are almost none available used, and the backlog for new ones is several years long. Or at least it was then.

Jennifer Good Spires says

March 24, 2016 at 11:05 pm

I sure love mine. I can hardly wait for spring!

Dan N Jaye says

March 24, 2016 at 11:13 pm

Interesting, Carolyn; we’re not looking to trade boats any time soon but you make good points.

Michael McIntosh says

March 25, 2016 at 1:18 am

How many degrees off the wind will she sail?

March 25, 2016 at 12:00 pm

50-ish, depending on sea state. Smooth water, closer than that.

March 25, 2016 at 1:26 am

Love our Gem, nearly 5 years and counting…

Kimberly Fain Ward says

March 25, 2016 at 7:14 pm

We love ours, too! Paula L Mueller, did you see this?

Paula L Mueller says

March 26, 2016 at 2:22 am

I had read it before and just read the whole thing again ?

March 26, 2016 at 2:25 am

Courtney Cali T says

March 26, 2016 at 10:43 am

James Tex Kilburn says

March 26, 2016 at 10:46 pm

I’m currently refitting a Gemini 3000. We’re very pleased with her performance as a Costal Cruiser and plan on upgrading to a 105 in a few years!

werner thomas says

June 9, 2016 at 9:48 am

hi great comments evaluating your cat. The small cats do it for me too, I now have a Catalac 10m after my first cat a Wharram Tiki 30! The centerboard set up ibdeed better upwind sailing but so much weaker in gunkholing! It is amazing how these under 35 foot cats have such large living areas. I would not howecer use a Gemini where I am cruising with my Catalac because no chandlers, no technical backup. My Catalac can take quite a knock which leseer strong cars wpuldnt survive. Imagine hitting an old bridge head thats completely dubmerged and nowhere indicated on charts but in major river gere in Mozambique. Great blog keep it up, I admire those bloggers that entertain/inform us so well.

Dan Rupli says

June 17, 2016 at 5:03 pm

I love the whole idea of the Gemini 35, but will always want to go around the world at least one time. Is there no compromise between catamaran comfort and Tayana blue water capabilities?

June 17, 2016 at 7:51 pm

There are definitely boats that are in between . . . some of the 40-foot cats and some of the lighter monohulls. No boat can be everything, though, so you have to decide what’s important for you.

June 20, 2016 at 1:42 pm

Thanks for this insightful article. I am one of many investigating/considering the Gemini – I’m curious whether you found yourself sitting on the combing when handling the wheel? I had not realized the other advantages you pointed out regarding visibility/convenience in handling.

June 20, 2016 at 3:34 pm

We rarely hand steer — only when doing close quarters work. The rest of the time we let the autopilot do it’s thing. But yes, we usually sit up on the “upper level” on the side of the cockpit.

mikeoore says

August 14, 2016 at 9:53 am

Great article. We are close to a boat purchase and liked both the gemini cats and my lifelong favorite, the Tayana 37. Being so different, and generally for different purposes, it was hard to make a choice. Your story helprf. Thanks

August 14, 2016 at 10:17 am

We really like both, but they are very different boats and best suited for different types of cruising. Glad you found the comparison useful!

Brian Kepner says

July 21, 2017 at 6:54 pm

Hope Gemini sends you some swag for this article.. I might consider one if I ever see one up here in the PNW. Cats are very uncommon up here.

Charles Dalesch says

July 21, 2017 at 10:21 pm

Scott Taber time to get a cat

Diane Mercaldo says

July 21, 2017 at 10:38 pm

Nice to have the added living space that is lighter and brighter. Bridge heights, OH YOU’RE SO LUCKY,I’m jealous and depth is no longer a factor, CONGRATULATIONS, enjoy and safe sailing!

Paul English says

July 21, 2017 at 9:13 pm

I’m still struggling with the whole “blue water” distinction – and I realize it is not necessarily razor sharp.

What features did your mono have that made it blue water, that the Gemini doesn’t?

Does the Gemini itself preclude blue water from your perspective – like you wouldn’t consider an Atlantic or Pacific crossing with it? Or would you consider it with (presumably pretty expensive) modifications?

And a more general question – do you think you would have been ultimately “equally open” to blue water sailing by purchasing a non-blue-water boat to start with, then simply traded up when you were ready and certain that you were going to cross an ocean?

July 22, 2017 at 7:11 am

It has a lot to do with build strength. The Tayana has a much thicker and heavier hull that would be much harder to hole. The deck to hull joint is also much “beefier.” Chainplates are attached with more bolts and are themselves larger. Winches were oversized. Water and diesel tanks were much larger. It’s also a heavy displacement boat and comfortable (well, relatively!) in large seas. It’s also things like the size of cleats, having secure places to clip in on deck and a protected cockpit.

I know of one Gemini that circumnavigated (Slap-Dash) and while they beefed it up before they went, they did major repair in most of the big cities they hit along the way.

The designer of the Gemini took one across the Atlantic — again, with modifications.

The thing about crossing an ocean is that you don’t know what weather you’ll encounter and your boat has to be okay to handle large seas. Now, we could island-hop through the Caribbean, where we’d have numerous open water passages — but most just about 100 miles long. That’s a single day. You can get a pretty good weather forecast for the next 24 hours so even “unexpected” conditions aren’t going to have the huge seas that would be a problem.

So, while others may have crossed oceans in a Gemini, I wouldn’t.

As to your more general question. I think when we began cruising (2002), there weren’t the blogs and Facebook that showed people cruising on a smaller scale. Most information came from circumnavigators — or at least ocean-crossers — in books and Cruising World. So our initial thoughts were that we’d be like all those folks . . . and wanted that type of boat.

July 22, 2017 at 2:53 am

July 22, 2017 at 4:00 am

Totally agree! We love our Gem too!

Steve Barnes says

July 22, 2017 at 4:01 am

What’s your hull number? We are a 1999 M #651 and have wooden boards. In good shape now, but was a pain restoring them after barnacles got through the paint and water rotted several spots.

July 22, 2017 at 10:34 am

We’re 655, just 4 after you.

July 22, 2017 at 12:49 pm

Consider yourself lucky!

Thom Hounsell says

July 22, 2017 at 10:53 am

Nice analysis. Thanks!

Pam Carr Jackson says

July 22, 2017 at 2:39 pm

Doug Jackson and I had an Island Packet then bought a sailing catamaran (a Lagoon). Agree with everything stated regarding the benefits of a cat vs monohull!

July 22, 2017 at 5:08 pm

Love our 2004 Gemini 105Mc, s/v Ally Cat! She took us from MA to Grenada and back and now we are LOVING exploring all the skinny water aournd us in Buzzards Bay!! Found the most beautiful spot on Nantucket a couple weeks ago…anxious to see where we ‘discover’ when we go out again for a couple weeks in August 🙂

Lorraine Steyn says

July 22, 2017 at 9:26 pm

I just hate the motion of a catamaran, that jerky motion in chop. Spoiled the sailing for me, despite the pleasures of more space for a live-aboard life

Steve Olson says

July 24, 2017 at 3:28 am

Oh man, I’ll never go Cat. I’d much rather have the T37!!

Smith Angie says

May 15, 2018 at 2:47 am

Thanks for sharing this information.It’s very usefull for me

George Poole says

August 18, 2018 at 9:02 am

This is an Excellent review – Thank you so much for the information.

All the best to you

Frank and Cindy says

August 22, 2018 at 9:35 pm

All these years later and this post is still drawing comments! Thanks for sharing your thoughts on the Gemini! We love our 105mc #816. S/V Mavis. I’ve been reading your stuff for years when owning a Gemini was just a dream! Fair winds and keep posting!

Thomas Pierquet says

September 18, 2018 at 11:03 pm

I am wondering what the boat speed is cruising at 2000,2500,and 2800 rpm respectively. I heard someone claim 8kts at 2800rpm. Is this possible? Or is that a stretch? I presently have a Beneteau 311 (cruises at 6kts@2800rpm) and have been considering a Gemini 105MC for more room. My wife would like to have a bigger cabin and more boat speed on the way home if no wind.. Also, how valuable is the option of the Screecher sail to the performance of these boats?

September 19, 2018 at 8:45 am

I’d say that’s a stretch. We can motor a little over 6 knots in very smooth water. Looking back on our logs, 5.8 is more common at 2800 — but remember that we are loaded for cruising/full-time living aboard, probably much more so than you would be if you still have a land-based home. We don’t have a screecher, so I can’t answer that — I know it would be fun on certain points of sail, but can’t talk to how it actually performs. I think we’d use it on the furler more than we use our asymmetrical spinnaker.

September 19, 2018 at 9:18 am

Thank you for your very timely reply. It’s always good to hear from an owner to get accurate information. I have been reading everything I can about the Gemini. I have decided that I want a 105mc to get the latest version with the centerboards. I would welcome all and any comments directly from owners of any of the performance positive or negatives. I enjoy my Beneteau 311 but need a main cabin bed with more room and more space for my grandkids to come along. Thanks again

October 2, 2018 at 1:14 pm

Great review of the boat. We are also considering a Gemini 105M along with a Prout Snowgoose. Can you comment on wave slap when at anchor on a typical night. I have been a power boater for years, have done a lot of anchoring out overnight and have never liked the chine slap at anchor if the wind is up.

October 4, 2018 at 9:04 pm

It all depends on the amount of wind and waves. Most nights, in a calm anchorage, it’s not noticeable. But if there are waves, you’ll hear them on the hull and you’ll hear some wave slap on the bridge deck.

JoAnna Mitchell says

January 25, 2020 at 10:21 am

Hi Carolyn, Thanks for this informative post! My husband and I are considering stepping up from our Hunter 30T to a Gemini 105MC. I have noticed in the listings that many have had the IO replaced with a standard outboard engine. What are your thoughts and what have you heard from other Gemini owners? Thanks for this page as well. We have used it a lot in preparation for our cruising future. JoAnna

January 25, 2020 at 12:35 pm

I know that many have made the switch but I think that more are still with the diesel. We did not want a gas engine as we simply didn’t want to carry that much gasoline on trips as it is MUCH more explosive than diesel fuel. However, they’re typically lighter weight and easy to have repaired or replaced should that be necessary.

Janet Smoot says

April 4, 2020 at 4:03 pm

We have owned our 2000 Gemini 105M for 8 years. We love it! We had a 25′ Catalina swing keel before that. Live the space..Plenty of sleeping for 4 people.The kitchen works great. Bought closed cell cushions for outside cockpit so very comfortable. Sail msilnly Potomac River and Chesapeake. But once we retire plan on longer trips. Works well for small grandchildren too. Can’t say enough good things about this cat. Never thought we could afford one. Gemini has now priced themselves out of the average sailor though. Thanks for the inciteful review.

Holly Henry says

October 8, 2020 at 11:03 am

Thank you for your website and information. We are looking at a 2000 Gemini 105M…it’s so difficult to find an MC. What does the MC have different that you would like? Thank you again for all of your information.

October 8, 2020 at 11:18 am

We have a 1999 105M.

Major changes in the MC:

• Mast is 1 foot taller and boom one foot longer, so mainsail is larger. Also bigger roach with the masthead crane.
• MC has an optional screacher.
• Seating at table is squared off, making it easier to nap on settees and huge difference in how easy the seats are to remove when you need to re-upholster.
• Table drops down to create a large bed for guests.
• Laminate centerboards instead of wood. Our 1999 M has the laminate boards, so it’s very likely the 2000 model does.
• Built-in air conditioning (this isn’t something we cared about, but it’s a big deal for many people)
• MC is 900+ pounds lighter, so it sails and motors faster with the same load.

October 8, 2020 at 7:08 pm

Thank you so much. Gemini’s are getting harder to find now that we are looking. Your website and info are invaluable to this part-time cruiser.

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• Sailboat Guide

Gemini 105MC

Gemini 105MC is a 33 ′ 5 ″ / 10.2 m catamaran sailboat designed by Tony Smith and built by Performance Cruising between 2003 and 2011.

• 2 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 3 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 4 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 5 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 6 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 7 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 8 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 9 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View
• 10 / 10 South Hero, VT, US 2005 Gemini 105MC $108,500 USD View

Rig and Sails

Auxilary power, accomodations, calculations.

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

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

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

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

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

Displacement / Length Ratio

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

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

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 Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

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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GEMINI 105MC Detailed Review

If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of GEMINI 105MC. Built by Performance Cruising and designed by Tony Smith, the boat was first built in 2003. It has a hull type of Catamaran Twin Cbrd. and LOA is 10.21. Its sail area/displacement ratio 27.69. Its auxiliary power tank, manufactured by Westerbeke, runs on Diesel.

GEMINI 105MC has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about GEMINI 105MC and decide if it is a fit for your boating needs.

Boat Information

Boat specifications, auxillary power tank, contributions, who designed the gemini 105mc.

GEMINI 105MC was designed by Tony Smith.

Who builds GEMINI 105MC?

GEMINI 105MC is built by Performance Cruising.

When was GEMINI 105MC first built?

GEMINI 105MC was first built in 2003.

How long is GEMINI 105MC?

GEMINI 105MC is 9.68 m in length.

Member Boats at HarborMoor

Are Gemini Catamarans Good? A Review of Popular Models!

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Are you interested in Gemini Catamarans, but you aren’t sure if they are up to par? Looking for my next boat i have done some extensive research into Geminis, here’s what I found!

Gemini catamarans are great boats, depending on what you are looking for. If you want a daytime cruiser, the Freestyle 37 or the Freestyle 339 Power are great options. If you want to take longer trips, the Gemini 105Mc and the Gemini Legacy 35 are ideal due to their multiple cabin designs. 

Next, we’ll go over the new models of Gemini boats, including one older model that is still regularly sold pre-owned. We’ll also discuss each boat’s pros and cons and whether or not the boats are suitable for you and your needs. 

Types of Gemini Catamarans – Old Models

The Gemini 105Mc Design Touch was one of Gemini’s most popular models. However, it is no longer in production. While no new ones are being made, you can still buy one used. Additionally, this boat is the predecessor of the new Gemini Legacy 35, so it’s essential to understand their differences. We’ll go over this boat in detail below. 

Gemini 105Mc Design Touch

This cruising catamaran has been one of the best-selling single-design cats since 1980. This isn’t surprising, considering this boat’s spacious layout and sound design. Every time you sail on this boat, you’ll feel safe and sound with its practically designed platform and kick-up rudders. While this boat is no longer being produced, many boat owners seek out used versions because of its amazing style and performance.  

Perks of the 105Mc Design Touch

Hull design ensures better performance.

The hulls of this boat are slim and teardrop-shaped. This helps ensure that the drag will remain at a minimum. Additionally, the hull design allows for more leeway when you’re under sail. Even more, the hull has a kick-up centerboard which enhances the boat’s windward pointing abilities, allowing for a better sailing experience. 

Raise Rudders for Shallow Waters

Inadvertently running aground is one of boat owners’ biggest nightmares. However, with the 105Mc Design Touch, it’s unlikely you’ll ever meet this terrible fate. This catamaran has a raised rudder design, ensuring that you can smoothly cruise into waters as shallow as 2 feet (61.0 cm) without hitting the bottom. 

Low Center for Added Safety 

Most boats today have a beam that measures about 50% of the length of the ship. However, the 105Mc Design Touch is unique in that its tiny beam only measures about 40% of the boat’s length. While both beam sizes have their advantages, the shorter beam on this catamaran makes it have a low center of gravity, ensuring that it remains upright, stable, and highly safe. 

Reasonably Priced 

This reliable boat is as functional as it is affordable. You won’t have to spend an arm and a leg to purchase this beauty. This is especially true if you get it used, which is your only option nowadays! 

What Are the Downsides of the 105Mc Design Touch?

Many users loved this boat and feel that it was one of Gemini’s best models yet. However, it does have a couple of flaws: 

• It only has one head . Only having one bathroom can be incredibly inconvenient, especially if you are overnighting with several people. For a boat with three cabins, it would be nice to have another head. 
• Its soft decks require maintenance . The decks are balsa-cored, meaning water can harm them over time. That means you’ll need to maintain the deck, especially around hatches, to keep the boat in tip-top shape. 

Specifications of the 105Mc Design Touch

• Overall Length: 34 feet (10.4 m)
• Beam: 14 feet (4.3 m)
• Displacement: 9,600 lb (4354.5 kg)
• Fuel capacity: 36 gallons (136.28 liters)
• Water capacity: 60 gallons (227.13 liters)
• Three cabins 

Is This Boat Right For Me?

The 105Mc Design Touch is a wonderful option for many people. This boat is especially great for: 

• It’s ideal for first-time catamaran owners with its low price and safe design. 
• Great for overnight weekend vacations with friends and family (if you can handle sharing one bathroom!) 

Types of Gemini Catamarans – New Models 

Gemini Freestyle 37

The Gemini Freestyle 37 has a flexible design that can accommodate your every desire. Whether you want a boat that is ideal for day-charters, family outings, or luxurious business cruises, the Freestyle has a layout for you.

Although this boat has a flexible and updated design, it still has the essence of the older Gemini 105Mc and the Legacy 35, providing you with new features you love and some of the old ones too! 

Perks of the Freestyle 37

Design is ideal for charters .

The Freestyle 37 has an incredibly flexible design, permitting you to set up your charter boat with all of the features you need. For example, you can choose to get this boat with a second head instead of the queen-sized cabin to accommodate “his and her” bathrooms, which is a must-have feature for most chartered tours. 

Additionally, you can alter the layout of the boat to accommodate your needs. Suppose you want to take out a large group of people to go snorkeling or sightseeing. In this case, you could arrange the deck with bench seats to fit as many people as possible. 

However, if you’d rather you use the catamaran to cater high-end parties or business excursions, then you could install chaise lounges, an outdoor galley, and a wraparound bar instead. So, no matter what kind of events you plan to hold on your catamaran, the Freestyle 37 has the perfect layout for you! 

Inexpensive Base Price

This boat has a low base price, permitting you to get the ship for a reasonable cost , then customize it based on your budget and needs. Additionally, it has a low cost of operation, which means you can actually make money from your charters instead of having to throw all of your hard earned cash right back into the boat. 

Even better, this boat allows you to easily change the furniture and outboard, ensuring that the boat always looks new and fresh without having to switch boats completely! 

Has a “Green” Version for Environmentalists 

One of this boat’s most significant advantages is that it accommodates an electric engine and solar panels, which are more environmentally friendly than diesel-run engines. Even if you aren’t an environmentalist, going green can save you money by lowering your operation cost. So, by selecting the green option, you’ll be protecting the environment and your wallet. It sounds like a win-win to me! 

What Are the Downsides of the Freestyle 37?

While this boat is an excellent option for a lot of people, it isn’t for everyone. Let’s take a look at the disadvantages of this catamaran below: 

• Not ideal for overnight trips with more than two people. This catamaran is an incredible sunset or daytime cruiser due to its open deck plan. However, it only has one cabin that can accommodate two people, so if you’re looking for something you, your friends, and family can take a weekend getaway trip on, this isn’t the boat for you. 
• Open design is not ideal for rough open waters. The open design of this boat is excellent for casual cruises around the bay. However, if you plan to take a trip across any serious body of water, this cat offers little protection. 

Specifications of the Freestyle 37

• Overall Length: 38 feet (11.6 feet) 
• Beam: 14 feet (4.3 m) 
• Displacement: 7500 lbs (3401.9 kg)
• Fuel capacity: 56 gallons (211.98 liters)
• One queen cabin (optional)
• One or two heads

This fun catamaran is an excellent choice for many sailors. We’ll go over this boats primary uses below so you can determine whether or not it’s the right choice for you: 

• Ideal for daytime cruises. 
• Great if you want to use it as a charter boat for sightseeing or events. 
• Perfect if you want an open platform that gives you the ability to “freestyle.” 
• It’s an excellent party boat with an open deck plan and seating area in the bow. 

Gemini Freestyle 339 Power

If you love to go fast, the innovative Freestyle 339 Power catamaran will give you the extra “oomph” you’ve been searching for. This boat has the original Freestyle’s stability and expansiveness but with a power-packed motor to quickly get you to your destination. If you are looking for a spacious, reliable, and speedy day cruiser, the Freestyle 339 Power is the ideal choice for you. 

Perks of the Freestyle 339

Dual engines for a faster ride .

This new Freestyle design is faster than ever before. It is powered by two Suzuki DF90A motors that allow for a typical cruising speed of 15 knots or a maximum speed of 22.5 knots, even when you have seven people aboard! This speedy ride will let you get where you want to go in no time. 

Incredibly Stable Design 

Unlike the previous model, the new Freestyle 339 has stability keels positioned behind the hulls, allowing her to draw only 18 inches (45.7 cm). Even more, the bows of this boat were revamped to include extensions. This permits the cat to lift up when its power increases. These features also enhance the boat’s stability, making her steadier than ever before. 

However, don’t just take our word for it! The Catamaran Company posted a review of the Freestyle 339 on YouTube. They were astounded by how smooth the ride was even when the boat faced choppy waves, an outward current, and wake from a passing ship. To check out this review for yourself, click the link below:

Versatile and Roomy 

The Freestyle 339’s helm is positioned in the front and center of the boat, giving you more space in your cockpit than in the previous model. This will provide you with plenty of room so you can invite all of your friends and loved ones on board your vessel for a day of boating fun. 

Additionally, the front of the vessel has two large bench seats where you and all of your friends can relax and enjoy the view. It also has an easy pop-out coffee table where you can enjoy a morning cup of jo or rest your drinks in the evening time. 

What Are the Downsides of the Freestyle 339?

Below, we’ll go over some of the potential downsides of the Freestyle 339: 

• It’s entirely motor-powered . If you love traditional catamarans with both sails and motors, this may not be the boat for you. The freestyle 339 is solely a power cat, with no sailing option available. 
• Not ideal for long trips . This catamaran only has one cabin and one head, making it great for daytime cruises but not ideal for more extended vacations unless just two people are traveling. Additionally, the boat doesn’t have a real shower. Instead, you have to use the extendable sink in the head to rinse off. This is fine for short trips but unideal for longer excursions. 

Specifications of the Freestyle 339 

• Overall length: 41 feet (12.5 m) 
• Hull beam: 14 feet (4.3 m) 
• Displacement: 10,000 lbs (4535.9 kg) when loaded 
• One optional cabin 
• Twin Suzuki 90 HP Outboards (larger 115 Suzuki engines available)

This boat is perfect for some uses but not so ideal for others. We’ll go over the ideal functions of this boat so you can determine whether or not it’s the right choice for you: 

• Perfect for daytime cruising. 
• Ideal if you enjoy the look of a catamaran but the power of a motorboat. 
• It’s a great “party boat” due to the open and customizable design. 

Gemini Legacy 35

This family-friendly cruising catamaran is stylish yet affordable. It is also effortless to maneuver, permitting you to sit back, relax, and enjoy the ride. With its 34 inch (86.4 cm) draft, it’ll be easy for you to pull this boat close to your favorite beaches. 

Perks of the Legacy 35 

Provides a stable sailing experience .

The Legacy 35 provides a level ride with little to no heeling. The steering and twin rudders are smooth and easily adjustable as you move across the water. 

Affordable Price 

The Legacy 35 is approximately the same price as a mid-sized monohull, yet it has an interior space that is larger than that of most 40 foot (12.2 m) monohulls, making it a great bargain. So, if you want catamaran space for monohull costs, the Legacy 35 is a perfect choice.  

Reasonably Sized Beam 

This small 14 foot (4.3 m) beam makes the boat easy to move anywhere in the country. No special accommodations are required. Similarly, hauling the boat out of the water is a breeze since all you’ll need is a standard travel lift. Even better, you can keep this cat in a standard-sized slip, saving you time and money looking for a larger one. 

Different Layout Options Depending on Your Needs 

This boat traditionally comes with three cabins and one head. The head is located in the aft hull, and the owner’s cabin is located in the front, fitted with a queen-sized bed. However, if this layout doesn’t suit your fancy, you also have the option of getting a boat with two cabins and two heads. This layout would have a queen bed in the front of the ship and a double bed in the back. 

What Are the Downsides of the Legacy 35?

• Some users think it’s too heavy . Some Gemini boaters felt the Legacy 35 gained too much weight compared to its predecessor, the 105Mc Design Touch. They didn’t like how the added weight caused the boat to drag. 
• The boat needs another winch at the helm station . According to sailor Mark Pillsbury , the Legacy 35 would be better if it had another winch at the helm station, making tacks easier. 

Specifications of the Legacy 35  

• Overall Length: 35 feet (11.0 m)
• Displacement: 9,800 lbs (4445.2 kg)
• Up to three cabins 
• Up to two heads 

The Legacy 35 is roomy and affordable, making it an excellent option for many boaters. Let’s discuss exactly what this boat is best for below: 

• It’s ideal for weekend trips due to its multi-cabin design. 
• It’s an affordable option for first-time catamaran owners. 

Are Gemini Catamarans Right For You?

Gemini catamarans are safe, stable, and reasonably priced, making them ideal for beginners. 

The Gemini Freestyle 37 and Freestyle 339 Power are highly versatile, making them perfect for families, charter boats, or luxurious cruises. Users love these boats’ versatility and stability.

The Gemini 105Mc Design Touch and Legacy 35 are also great day cruisers. However, their additional cabins make them ideal for longer excursions as well. These boats are safe, easy to maneuver, and stable, making them perfect for family vacations. 

While these are great boats, they aren’t for everyone. If you’re in the market for a luxury catamaran with all of the bells and whistles, then Gemini cats likely won’t satisfy your needs. Similarly, these boats tend to be better for shorter sails than long-term sabbaticals. So, if you plan to sail around the world in your catamaran, you may want to choose a different brand. 

Final Thoughts 

Gemini catamarans are safe, stable, and reasonably priced, making them great all-around boats. Their freestyle line is ideal for day cruises or to be used as “party boats” due to their customizable design. Their Design Touch and Legacy boats can be used as cruisers or for extended vacations, depending on your needs. All around, these are fabulous boats worth looking into! 

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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105MC vs Legacy 35

• Add to quote

........  

Layla said: I wonder if the new Gemini Legacy 35 design might be a downgrade compared to the earlier 105MC. I am not interested in catamarans, but still, I would like to learn what Gemini people were aiming with the new design. Click to expand...

...............  

The quickish answer is that I don't believe that the original "Gemini People" are still with Gemini. It is my understanding that somewhere around 2012 Gemini began being built by Hunter under a contract solely to manufacture the Geminis. At some point Hunter was sold to Marlow, who built the Gemini's for a while. Apparently, in 2014 Gemini made a deal with Catalina to build the Gemini's. At this point, it is not clear who actually builds Gemini Catamarans., but I understand that Tony Smith has called it quits. To perhaps explain the different kind of sailor, there is a pretty broad universe of what each person wants out of boating, and owning a boat. For some there is pleasure in just sitting aboard for a short period, enjoying being near the water even if they never leaving the dock. For others its is simply the joy of being at sea far out of site of land. Somewhere in between there are coastal cruisers. Somewhere closer to the sit on the boat and enjoy the view is the live-aboard, Somewhere near coastal cruisers and live aboard are daysailers Somewhere in the range near the coastal cruiser/ offshore cruiser, but in their owner corner of the universe are performance cruisers. And further out there somewhere out there but spanning along the spectrum are racers. And not one of these is inherently better or worse than the other. They are just different preferences. The Gemini's started out as simple and affordable, albeit dated and pretty low performance as catamarans go. the 105MC was a slight upgrade from that original concept. But when a salesperson says, "different kind of sailor " I would have to assume that the boat fits somewhere different in the spectrum of boats. neither inherently better or worse, just different. These things are like trying to proved that one flavor of ice cream is universally better than another. Jeff  

Jeff_H said: These things are like trying to proved that one flavor of ice cream is universally better than another. Click to expand...

www.parinavoyage.com --- Sailing the Gemini Catamaran Sailing - 3 - YouTube Why changing the winning team?  

I owned a 1989 3000 and I currently own a 2007 105Mc. Both have centerboards and go to windward as well as most cruising sailboats. As for speed we hit 14.5 knots while broad reaching in 30 plus knots of wind.  

Layla, you got to drive an Amphicar? They were only built from 1960–1965 and there were only 3,878 built. There aren't many of them left on the road. Where did you get to drive one?  

midwesterner said: Where did you get to drive one? Click to expand...

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