kd 105 catamaran

• New Sailboats
• Sailboats 21-30ft
• Sailboats 31-35ft
• Sailboats 36-40ft
• Sailboats Over 40ft
• Sailboats Under 21feet
• used_sailboats
• Apps and Computer Programs
• Communications
• Fishfinders
• Handheld Electronics
• Plotters MFDS Rradar
• Wind, Speed & Depth Instruments
• Anchoring Mooring
• Running Rigging
• Sails Canvas
• Standing Rigging
• Diesel Engines
• Off Grid Energy
• Cleaning Waxing
• DIY Projects
• Repair, Tools & Materials
• Spare Parts
• Tools & Gadgets
• Cabin Comfort
• Ventilation
• Footwear Apparel
• Foul Weather Gear
• Mailport & PS Advisor
• Inside Practical Sailor Blog
• Activate My Web Access
• Reset Password
• Customer Service

• Free Newsletter

Blue Jacket 40 Used Boat Review

Catalina 270 vs. The Beneteau First 265 Used Boat Match-Up

Ericson 41 Used Boat Review

Mason 33 Used Boat Review

How to Create a Bullet-Proof VHF/SSB Backup

Tips From A First “Sail” on the ICW

Tillerpilot Tips and Safety Cautions

Best Crimpers and Strippers for Fixing Marine Electrical Connectors

Polyester vs. Nylon Rode

Getting the Most Out of Older Sails

How (Not) to Tie Your Boat to a Dock

Stopping Mainsheet Twist

Fuel Lift Pump: Easy DIY Diesel Fuel System Diagnostic and Repair

Ensuring Safe Shorepower

Sinking? Check Your Stuffing Box

What Do You Do With Old Fiberglass Boats?

Boat Repairs for the Technically Illiterate

Boat Maintenance for the Technically Illiterate

Whats the Best Way to Restore Clear Plastic Windows?

Stopping Holding-tank Odors

Giving Bugs the Big Goodbye

Galley Gadgets for the Cruising Sailor

The Rain Catcher’s Guide

Sailing Gear for Kids

What’s the Best Sunscreen?

UV Clothing: Is It Worth the Hype?

Preparing Yourself for Solo Sailing

R. Tucker Thompson Tall Ship Youth Voyage

On Watch: This 60-Year-Old Hinckley Pilot 35 is Also a Working…

On Watch: America’s Cup

On Watch: All Eyes on Europe Sail Racing

Dear Readers

• Sailboat Reviews

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.

LEAVE A REPLY Cancel reply

Log in to leave a comment

Latest Videos

Cabo Rico 34 Boat Review

Super Shallow Draft Sailboat: The Leeboard Sharpie

Hans Christian 41T – Boat Review

Seven dead after superyacht sinks off Sicily. Was the crew at...

Latest sailboat review.

• Privacy Policy
• Do Not Sell My Personal Information
• Online Account Activation
• Privacy Manager

• The magazine

Current issue

• All the issues
• My magazines
• Technical specifications
• Multihull of the Year
• Classified Ads
• Destinations
• Online store
• All the magazines
• Subscriptions
• Accessories

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

Add several tests to your cart

and get an extra discount!

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 ...

To read in full, Buy the boat test

Tags : 

• Boat review

What readers think

Post a comment

No comments to show.

MW #197 - Oct / Nov 2024

Download all the Boat Tests

Over 500 multihull tests

Place a classified ad Free of charge

on Multihulls World

Boat tests from the same range

• Seawind 1170

• Xquisite 30 SportCat

• HopYacht 30

• Bali Catsmart

Classified ads

TRICAT 30 PERFORMANCE

TRIMARAN FARRIER F9AX

Privilege 515 (2010 - refit 2021) v. 3 cabins

Power catamaran Fountaine Pajot Greenland 34 - fully self-sufficient

Vous avez ajouté " " à vos favoris., vous avez supprimé " " de vos favoris., in order to add this article to your favorites, please sign in..

• Find or Create a Group

Keyboard Shortcuts

• K-Designs-Multihull-Sailboats
• previous page

Moderated KD105 extra info pls.

Verify Delete

Verify repost, report message.

Note: Your email address is included with the abuse report.

Split Topic

The new topic will begin with this message. Subject of the new topic:

Did You Know That We Offer Contract to Closing Services? Click Here to Find Out More.

Need Marine Financing? Apply Here With Our Partner, First Approval Source

• Catamaran Interviews
• Catamaran Reviews
• Buying Advice
• Selling Advice
• Woods Design Advice
•     Admiral 38
•     Admiral 40
•     Admiral 50
•     Americat 3014
•     Antares 44
•     Aquila 44
•     Aquila 48 Power Catamaran
•     Aventura 37
•     Balance 442
•     Balance 482
•     Balance 526
•     Bali 4.0
•     Bali 4.1
•     Bali 4.2
•     Bali 4.3
•     Bali 4.4
•     Bali 4.5
•     Bali 4.6
•     Bali 4.8
•     Bali 40 Catspace
•     Bali 5.4
•     Bali Catsmart
•     Beneteau Blue II
•     Broadblue 346
•     Broadblue 38 Prestige
•     Broadblue 385
•     Broadblue 435
•     Broadblue 46
•     Rapier 400
•     Rapier 550
•     Catalac 10M
•     Catalac 11M
•     Catalac 12M
•     Catalac 8M
•     Catalac 900
•     Catalac 9M
•     Catana 381
•     Catana 39
•     Catana 401
•     Catana 40S
•     Catana 411
•     Catana 42
•     Catana 42 S
•     Catana 431
•     Catana 44
•     Catana 471
•     Catana 50
•     Catana 521
•     Catana 531
•     Catana 55
•     Catana 581
•     Catana 65
•     Catathai 44
• Chris White
•     Chris White 48 Voyager
•     Chris White 55
•     Condor 40
•     Contour 34
•     Corsair F28 R
• De Villiers
•     Dean 365
•     Dean 400
•     Dean 440
•     Dean 500
•     Dix DH550
•     Dolphin 380
•     Dolphin 460
•     Edel 35
•     Endeavour 30
•     Endeavour 35 Victory
•     Endeavour 36
•     Endeavour 44
•     Endeavour 44 TrawlerCat
•     Endeavour 50 Pilothouse Trawler
•     Excess 11
•     Excess 15
•     F-41
•     Fastback 43
•     Fastcat 445
•     Fisher 28
•     Fisher 32
•     Fortuna 36 Island Spirit
•     Fortuna 401 Island Spirit
• Fountaine Pajot
•     FP 32 Maldives
•     FP 35 Tobago
•     FP 36 Mahe
•     FP 37 Antigua
•     FP 38 Athena
•     FP 39 Fidji
•     FP 40 Isla
•     FP 40 Lavezzi
•     FP 40 Lucia
•     FP 40 MY
•     FP 40 Summerland MY
•     FP 41 Lipari
•     FP 42 Astrea
•     FP 42 Venezia
•     FP 43 Belize
•     FP 44 Helia
•     FP 44 Orana
•     FP 45 Elba
•     FP 46 Bahia
•     FP 46 Casamance
•     FP 48 Salina
•     FP 50 Saba
•     FP 56 Marquises
•     FP 57 Sanya
•     FP 58 Ipanema
•     FP 60 Eleuthera
•     FP Saona 47
•     Fusion 40
•     Gemini 105
•     Gemini 3000
•     Gemini 3200
•     Gemini 3400
•     Gemini Freestyle 37
•     Gemini Freestyle 399 Power
•     Gemini Legacy 35
•     Grainger 420 Mystery Cove
•     Gunboat 55
•     Hirondelle 7M
•     HopYacht 30
• Island Packet
•     Island Packet Cat 35
•     Kennex 420
•     Knysna 440
•     Knysna 480
•     Knysna 500
•     Knysna 550
•     Lagoon 35
•     Lagoon 37 TPI
•     Lagoon 380
•     Lagoon 39
•     Lagoon 40
•     Lagoon 400
•     Lagoon 410
•     Lagoon 42
•     Lagoon 42 TPI
•     Lagoon 420
•     Lagoon 421
•     Lagoon 43 PC
•     Lagoon 44 Power Cat
•     Lagoon 440
•     Lagoon 450
•     Lagoon 46
•     Lagoon 470
•     Lagoon 50
•     Lagoon 500
•     Lagoon 52F
•     Lagoon 55
•     Lagoon 560
•     Lagoon 570
•     Lagoon 620
•     Lagoon Seventy 8
•     Lagoon Sixty 7
•     Leeuwin 42
•     Leopard 38
•     Leopard 39
•     Leopard 39 PowerCat
•     Leopard 40
•     Leopard 42
•     Leopard 43
•     Leopard 44
•     Leopard 45
•     Leopard 45 Classic
•     Leopard 46
•     Leopard 46 Lion PowerCat
•     Leopard 47
•     Leopard 47 PowerCat
•     Leopard 48
•     Leopard 50
•     Leopard 51 PowerCat
•     Leopard 53 PowerCat
•     Leopard 58
•     Lidgard 73 Executive
•     Looping 50
•     Maine Cat 30
•     Maine Cat 38
•     Maine Cat 41
•     Manta 40
•     Manta 42
•     Matrix 450 Vision
•     Matrix 760 Silhouette
•     Maverick 400
•     Maverick 420
•     Maverick 440
•     Moxie 61
•     Nautitech 40
•     Nautitech 40 Open
•     Nautitech 44 Open
•     Nautitech 442
•     Nautitech 46 Open
•     Nautitech 47
•     Nautitech 47 Power
•     Nautitech 475
•     Nautitech 65
•     Neel 45
•     Neel 47
•     Outremer 40
•     Outremer 45
•     Outremer 50 Standard
•     Outremer 55
•     Outremer 5X
•     PDQ 32
•     PDQ 36
•     PDQ 42 Antares
•     Privilege 37
•     Privilege 39
•     Privilege 42
•     Privilege 43
•     Privilege 435
•     Privilege 45
•     Privilege 465
•     Privilege 48 Transcat
•     Privilege 482
•     Privilege 495
•     Privilege 510
•     Privilege 65
•     Privilege Serie 5
•     Prout 31 Quest
•     Prout 33 Quest
•     Prout 34 Event
•     Prout 35 Snowgoose
•     Prout 37 Snowgoose
•     Prout 37 Snowgoose Elite
•     Prout 38
•     Prout 38 Manta
•     Prout 39 Escale
•     Prout 45
•     Prout 46
•     Royal Cape 45
•     Royal Cape 500 Majestic
•     Royal Cape 530 Majestic
•     Sailcraft 30 Iroquois
•     Sailcraft 32 Comanche
•     Sailcraft 35 Cherokee
•     Sailcraft 41 Apache
•     Sailcraft 44 Apache
•     Scape 39
•     Wildcat 350
•     Seacart 30
•     Seawind 1000
•     Seawind 1160
•     Seawind 1190
•     Seawind 1200
•     Seawind 1260
•     Seawind 1600
•     Simpson 48
•     Solaris 36 Sunrise
•     Solaris 36 Sunstar
•     Solaris 42
•     St Francis 44
•     St Francis 48
•     St Francis 50
•     Stealth 11.8
•     Sunreef 60
•     Sunreef 62
•     Sunreef 70
•     Sunreef 74C
•     Sunreef 82 DD
•     Sunreef 88 DD
•     Switch 51
•     Switch 55
•     TRT 1200
•     Heavenly Twins 26
•     Ocean Twins 38
•     Vaan R5
•     Vision 444
•     Voyage 380 Maxim
•     Voyage 400 Norseman
•     Voyage 430 Norseman
•     Voyage 440
•     Voyage 450 Cabriolet
•     Voyage 47 Mayotte
•     Voyage 480
•     Voyage 500
•     Voyage 580
•     Voyage 590
•     Kronos 45
•     Wharram 38 Tiki
•     AMI 320 Renaissance
•     Woods 22 Wizard
•     Woods 35 Banshee
•     Woods 35 Flica
•     Woods 36 Scylla
•     Woods 36 Vardo
•     Woods 38 Transit
•     Woods 40 Meander
•     Xquisite X5
•     Xquisite X5+

Brand: Gemini 105

Jump to Gemini 105 Catamarans For Sale

The Gemini 105 was designed to be affordable, compact, relatively easy vessels for sailors new to catamarans. Production began with the 105M (meaning 10.5 meters), with a design change in 2004 to the 105MC, notable differences being the extended cockpit cover to allow for a full enclosure and a slightly taller mast (while still remaining ICW-friendly). In fact, the “c” in the 105Mc stands for “convertible,” likening the cockpit to that of a sports car. The Gemini Owners Group has a complete list of the numerous small differences between the M and MC as well as there are owner interviews below on this website that explain differences.

Gemini 105M (Florida)

Aireze is a Florida-based 1999 Gemini 105M catamaran for sale by owner.  The Gemini 105 was designed to be affordable, compact, relatively easy vessels for sailors new to catamarans.  It is one of the most popular catamaran designs ever built with over 1,200 hulls constructed.

Aireze is easy to handle and well equipped with a new Raymarine Autopilot, Lewmar electric windlass, new electric head, lazy jacks, 2-100 watt solar panels, new Garmin 9″ touch screen, davits , all new rigging and lines installed 2016, new water heater, new alternator, water pump, impeller, elbow, sea strainer, heat exchanger just serviced,  new belts and filters. …

Gemini 105M (California)

First introduced on the original Gemini 105M, the hull shape of the 105M is still revolutionary in the multihull industry. The hulls of the Gemini 105M are shallow and shaped much like a “teardrop” which requires little force to move the 105M through the water yet it also provides a high load carrying capacity.  

The Gemini 105 was designed to be affordable, compact, relatively easy vessels for sailors new to catamarans.

Educational Articles

“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.…

• Tags Catamaran Interviews , Catamaran Reviews

Gemini 105 MC Review and Owner Interview – S/V Kid Cat

As we continue in our series about Gemini catamarans, Melissa interviews Eric from the Gemini Owners Group who owns a Gemini 105 MC called S/V Kid Cat and sails out of Montreal and is planning to go out the St Lawrence in the summer and to the Bahamas maybe next winter. He weighs in with a different perspective on the never ending debate whether Gemini 105’s are blue water boats. He outlines differences between the 105 M and 105 MC. He mentions some common problems of the 105 MC. And he recommends the model to everyone.…

Gemini 105 Review

No catamaran discussion would be complete without a nod to the 34’ Gemini 105M and 105 MC line of catamarans, created by designer Tony Smith. From modest beginnings in 1996, the Gemini 105 has become one of the most popular domestic-built catamarans in the United States, with over 1200 hulls splashed.

Gemini Catamaran History

Originally built in Maryland, the Gemini 105 model began with the 105M (meaning 10.5 meters) in 1995 and then a design change in 2004 to the 105MC, some notable differences being the extended cockpit cover to allow for a full enclosure and a slightly taller mast (while still remaining ICW-friendly).…

KD 650 Listening to my customers, as I always do, I sensed a demand for a small trailer, coastal cruising catamaran. Looking my files over I stumbled over some photos from our old “Butterfly”. I designed this boat 1983. Construction toke us three mounts spare time. We have had a lot of good sailing fun with this boat. We used it also for holiday cruises along the Dutch coast. Here some pictures of the boat.   My wife at the helm And in the port As can be seen on this picture the boat sports already a biplane rig with a bent gaff. The boat was very fast and stiff. I do not remember the weight of the boat anymore but it was light. When we where lying on a beach at low tide and wanted to stay a bit longer I was lifting the boat under the fore beam and tracked it a bit higher on the beach. Some Technical Data Length overall - 6,5m Beam center line to center line - 3,0m Draft - 0,25m Draft dagger boards - 1,4m Sail area - 2x 12 m2 Outboard engine - Yanmar 6 HP This boat was my test bed for new ideas like the biplane rig, sails sleeved over the mast. The sleeve could be opened with a zipper for easy of removal. The gaff was made from carbon fiber. An absolute novelty for this time. As can be seen on the picture the dagger boards where on the inside of the hulls. For a perfect trim the could candle about 12 ° forward and backward. This was my first boat with an trapezoid cross section. The hatches could slide and turned up. Starboard hull looking aft towards the “pantry”. Watch the water container at the right. A nifty construction. The could be folded when empty. We have had provisions to hang them up and have had“running water”. But I never found them again. Starboard hull looking forward. The folding table and the mast box at the right can be seen I was thinking about this boat as I got the ideas for the KD 650. It is a trailerable, beach, costal cruiser racer. It is a mouth full ;-) But this was the idea. The KD 650 Specifications LOA hulls - 6.50 m without rudders Beam c/c - 3.00 m Beam catamaran - 3.50 m Beam on trailer - 2.00m Draft hull/rudders - 0.33/0.54 m Weight empty - 340 kg Weight CWL - 760 kg Sail area - 18.6m2 L/B hulls - 1 : 16.6 Prismatic coefficient - 0.568 L/B ratio center line - 50 % Construction time about - 500 hours Engine, outboard - 4 HP The main features of the boat: The hulls have an asymmetrical hull shape with a 1/3 , 2/3 asymmetry. Construction is plywood/glass cloth/Epoxy composite. Because of the asymmetrical hulls no dagger boards or keels are necessary. The rudders are dagger board rudders with automatic kick-up system when an obstacle is hit. A hull weights about 90 kilograms ( 198 lbs). Good to handle under construction and when setting the boat up. The seat position on the aft decks and the feet resting on the trampoline will make long sailing trips a lot more comfortable. The KD 650 - top view and lay out The top view shows a possible lay out. The “Butterfly” was 84 cm wide, the KD 650 is 92 cm wide. This 8 cm makes a big difference. It is now possible to have a L-shaped seating arrangement. See next picture . The port hull sleeps 2 and has a toilet under one of the bunks. The starboard hull has a seating area with a folding table and a small pantry with cooker and sink. The seat area can be converted to an other bunk. By the way, the pantry is an option, I personal prefer to cook on deck. The wet lockers can be used for ropes, the anchor and other deck gear not in use. Under the bunks are huge storage areas. The compartments under the wet locker and the aft bunk under the wet locker and the aft bunk respectable the lower area under behind the pantry make the boat unsinkable. Inside starboard hull The hulls are set up upside down. The boat is built on 5 bulkheads, including the transom. I stick to the normal building system on stringers. The reason is simple that a first time boat builder will be secure in this way to have enough references to make fewer mistakes compared to other systems so he will end up with two similar hulls. The drawings are all CAD drawings scale 1 : 1. The costs for the materials for plywood boat are in general reasonable. A commercial rig can cost as much as the whole boat again. So I designed a Gunter gaff rig people can build by themselves. An impressive example is this very old “Sonderklasse” boat with it's beautiful Gunter rig. German J class boat with Gunter rig Through a different approach the main sail is set with one halyard only. The gaff is connected with two batten sliders to the mast. As can be seen in the picture the upper sail part has a sleeve like a wind surf sail. The mast is free rotating. No boom, less costs and more safe. No mast will stick out from the trailer. No back breaking maneuver to set the 4.3m (16 ft ) long mast. This sail will be as efficient as a very good Bermuda rig. Through the direct connection of the gaff to the mast it will also point as high as any other modern rig. The beams are standard aluminum tubes. Besides cutting them to length and trilling two holes nothing to be done. Fastening the beams will be quick with the Eccentric fastening/release system on the inside of the hulls and four nuts at the outside. More time will be spent fastening the trampoline than anything else. The boat has a maximum dynamic stability of 1300 kgm. Even at a wind speed of 25 knots the rest stability (recovery stability) at 50° is still 500 kgm. Calculated with a reserve of 90 % ! Our speed calculation shows that the boat has a good speed potential. The boat will have a speed of 17 knots at a wind speed of 21 knots ( this is the wind speed a hull starts to lift of the water surface) and a speed of 12 knots with a wind speed of 12 knots. Not bad for such a small boat. Best regards Bernd Kohler The web page with more information about this boat can be found at: https://www.ikarus342000.com/KD650page.htm Sign In or Create Account Forgot password. If you don't receive the email within an hour (and you've checked your Spam folder), email us as [email protected]. ALERT: WAREHOUSE CLOSURE SEPT 21-29. SHIPPING RESUMES SEPT 30th. Plans & Kits Plans by type KD 860 Plans Create New Wish List Description Additional information. These are full plans - for study plans click  HERE This is our smallest offshore cruiser. A sea worthy fast cruiser catamaran for a family of four. The performance of this boat is exceptional on all courses to the wind. To make sure of this, the boat is light and has a low streamlined profile for windward performance. The study plans include diagrams for speed prediction and dynamic stability, so you can see for yourself. The hulls have the proven trapezoid cross section. For wind ward performance the boat has anti-vortex panels. These work a lot better as low aspect ratio keels and are not as prone to damage as boards. Besides, why spoil one of the best advantages of a multi hull, low draft, to enter coves etc a keel boat never can enter? For an explanation how these work go to the anti vortex article . The boat is, like all our boats, a plywood/glass/epoxy composite construction. Any handy amateur can build this boat without difficulties and surprises. Construction time around 1200 hours. Designing a catamaran in this size is a challenge if you would not end up with a floating caravan. I used our practical experience with our Pelican to design this boat. The maximum height in the central cabin is 1.48 m. I found the solution for a reasonable ergonomy by using 3 entrances. To step in the hulls, the port or star board entrance is used. The central entrance is very convenient to step in the central seating area. As shown in the drawing, there is amble seat height in the central cabin. There is standing height ( 1,95m ) in the hulls. The trapezoid shaped hulls have a fine entrance. The length to beam ratio of the hulls is 1 : 11. This will guarantee a fast boat (see spec. for speed prediction). The boat is relative low with good aerodynamic properties. Even with shortened sails the boat will go to windward. A factor often forgotten. There is sufficient room for four persons for extended voyages. CONSTRUCTION The boat is designed in a way that even first time boat builders can build the boat without difficulties. All 32 CAD drawings are to scale (1 : 1). A 32 page description will aid you building the boat. All our 26 years of experience designing boats for amateurs is flowing into this design. We chose again plywood as basic material for availability world wide and cost efficiency. 1 floor 2 bridge deck stringer 3 door 4 chard table /navigation 5 book/instruments shelf's 6 deck stringers 7 hatch 450x380 mm 8 vertical mast bulkhead 12 mm plywood 9 lockers 10 two persons bunk 11 pantry 12 U settee for up to 6 STUDY PLAN The study plan consists of 29 pages and includes 22 illustrations, a short construction description table of contents of the plans and the list of materials. LOA/LWL - 8.60m Beam - 5.60m Draft hull/rudder - 0.4/0.7m Weight empty - 1800kg Weight cwl - 3000kg Sail area: -   Main - 27m2 Jib - 10m2 Reacher - 26m2 L/B ratio - 1:2 L/B ratio - hulls - 1:11 Prismatic coefficient - 0.569 Righting moment max - 5600kgm Optimum speed - 21.5kn Outboard engines - 2x 6 HP Related Products KD 860 - Study Plans KD 650 Plans Kalostyn Plans Kastri plans Blue Coast 105 Sailing Catamaran The super yacht catamaran yacht BLUE COAST 105 " Allures " with a timeless elegant design by Jean-Jacques Coste for a sophisticated, fast performance luxury full-custom catamaran. Description This BLUE COAST 105 combines luxurious comfort on board with seaworthiness and life at sea with its tremendous performance under sail with 729sqm total sail area and engines of 2 x 440 Ps. With long waterlines and a very efficient sail plan, the BLUE COAST 105 can reach speeds of over 20 knots in complete safety and comfort. Even under power, the top speed of 16 knots allows fast cruising to the destination. The large interior volume allows the saloon deck and cabins to be freely arranged according to the owner's wishes. The flybridge is a very comfortable outdoor area. A whirlpool, large sunbathing areas, a dinner table for 10 people and the wet bar with grill offer plenty of comfort. Forward on both sides a steering position and the winches for sail handling. On the main deck, in the forward area, a dinner table for 10 people and a lounge area with 180-degree views of the sea, the bay or the marina. In the middle area of the main deck, another very spacious lounge and bar. To starboard, a luxurious owner's suite with private luxury bathroom with double vanity and whirlpool bath, accessed via stairs. The spacious aft cockpit is connected to the saloon by a wide-opening sliding door, creating an enormously large open space. Here too, a dinner table for 10 guests and two lounge sofas. The main deck and flybridge are the best places to relax and enjoy with friends and family. On the lower deck to starboard 2 spacious VIP cabins with en suite facilities and forward crew quarters.  To port is the professional kitchen, where the chef's creativity knows no bounds. In front of it, two more luxurious double cabins and another crew quarter in front. The interior can be designed according to your style. The bow tips can be designed as a negative stem to extend the waterline and allow for wave piercing: When waves come from the front, the catamaran is not lifted, it does not lean and therefore does not lose speed. Available with traditional diesel engines or with the innovative electric hybrid system "Green ECO Power" with electric motors. Design according to your preferences Alternatively, the design of this BLUE COAST 105 can be customised to your requirements in terms of number and layout of cabins, interior fittings and furnishings. Manufacturing your Yacht Under the constant supervision of Catamaris ®  and Jean-Jacques Coste, your BLUE COAST 105 catamaran will be built in a certified shipyard in Europe with many years of experience in successfully manufacturing numerous luxury yachts and multihulls. Technical Specifications LOA 105ft - 32.00m Beam 43ft - 13.25m Draft 6.2-9.9ft - 1.90-3.00m Building Prepreg Carbon/Epoxy/PVC foam core Building 2 Certified Aluminium Guest 8 Crew 4 Total sail area 729m² Main Engines 2 x 440hp Max speed under power 16 knots Optionally “Green ECO Power” Hybrid propulsion Naval Architect Jean-Jacques Coste Interior Design Jean-Jacques Coste Layouts of Blue Coast 105 Every BLUE COAST YACHTS catamaran is unique and among the best full-custom catamarans in the market because of their creative designs and highest build quality. Jean-Jacques Coste's signature has made his designs timeless and elegant while maximising performance, comfort and luxury. 155 COMMENTS [email protected] It will focus on the building process of all Mr. Kohler's designs: DUO 425 & 480, DUO 650, DUO 800, DUO 900, DUO 105, DUO 1001, ECO & ECO 7.5, KD 650, KD 800, KD 860, KD 122 VOYAGER, P95, CORMORANT, MANTA, PELICAN, SEAGULL, ZEEMAN and his ECO Power Cats are a few examples of his many designs. Duckworks Here's a DUO 105 under construction in the U. K. The first hull of a DUO 1000 is ready to turn right side up. This is in the Netherlands. The customer is now busy to making the rudders, rudder housing etc. And here a photo from a KD 122 "Voyager" under construction in Maryland. and an ECOnomy cruiser power cat under construction in Alaska ... [email protected] 10/22/19. K - designs Multihull Sailboats group is about design and construction of multihull sail and power boats by Bernd Kohler. Mr. Kohler's designs use the plywood/glass/epoxy building techniques. These techniques allow amateurs to construct coastal and ocean going multihull sailboats and coastal multihull power boats. [email protected] In a storm you will be grateful for this behavior. The KD 122 Voyager is a big boat with a centered accommodation for better creature comfort, The boat has not more accommodation as a 10 m boat. The reasons are to keep the bow and transom area light. This helps to make the boat even more seaworthy. The Gemini 105 I dought the Catamaran Co. is not going to spend money to change the design that is selling all they are making already. Hunter is just contracted to build the Gemini cats not an owner. We love our 02 Gemini 105Mc with the oiled teak interiors sence it can be re-oiled and looks new after lots of use in it's 10 years. We looked at lots of sailboats both monohull and some cats and we compaired ... Gemini 105 Review Gemini 105 M. The Gemini 105s were designed to be affordable, compact, relatively easy vessels for sailors new to catamarans. In the performance - comfort — cost trifecta, there is a definite favor towards cost, which can equate to quality issues. However, Gemini owners swear by their performance and aspects of comfort. GEMINI 105MC 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. Gemini 105 MC Review and Owner Interview Gemini 105 MC "Kid Cat". As we continue in our series about Gemini catamarans, Melissa interviews Eric from the Gemini Owners Group who owns a Gemini 105 MC called S/V Kid Cat and sails out of Montreal and is planning to go out the St Lawrence in the summer and to the Bahamas maybe next winter. He weighs in with a different perspective on the ... KD860 catamaran by K-Designs nero: KD860 catamaran by K-Designs. nero. : KD860 catamaran by K-Designs. The boat is an easy to build plywood/glass/epoxy construction. Plans from this designer are quite affordable. This designer has other designs available. LOA/LWL: 8.60m Beam: 5.60m Draft hull/rudder: 0.4/0.7m Weight empty: 1800 kg Weight cwl: 3000 kg Sail area Main: 27 m2 ... Wooden Boat Kits, Boat Building & Plywood Suppliers KD 860 - offshore catamaran. This is Bernd Kohler,of K-Design's smallest offshore cruiser. A sea worthy fast cruiser catamaran for a family of four. The performance of this boat is exceptional on all courses to the wind. To make sure of this, the boat is light and has a low streamlined profile for windward performance. The study plans include ... Gemini 105Mc 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. KD 860 Update KD 860 Update. This is an update to my KD 860 cruiser catamaran design. I do so because a lot of your readers are interested in my designs as I can see on my counter statistic. The first boat is (almost) ready and was built in Turkey. They have made some changes to the design, but basically it shows what can be done to "customize" a ... Boat Review by Multihulls World of: Catamaran Gemini 105 Mc Boat Test price 5.00€ Inc. tax. Purchase. 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 ... [email protected] I bought it years ago with the intent of one day being in possession of the time or money to put a catamaran on it. I am nearly as old as Bernd (79 this year ) and think I may be running out of time. ... there are not many photos from a KD 105. K-designs is a one men's operation, from the toilet cleaner, the designer, to the general director ... Duckworks Magazine A 32 page description will aid you building the boat. All our 26 years of experience designing boats for amateurs is flowing into this design. We chose again plywood as basic material for availability world wide and cost efficiency. Legend. 1 - floor. 2 - bridge deck stringer. 3 - door. 4 - chard table /navigation. Plans by designer DUO 900 Study Plans. $15.00. DUO 900 Study Plans For full plans click HERE The DUO 900 is a quick-to-build, open-bridge catamaran with asymmetrical hulls. The boat was designed for a French fighter pilot who lived in Argentina. His goal was to sail from Buenos Aires to Marseille... Gemini 105 Catamarans For Sale The Gemini 105 was designed to be affordable, compact, relatively easy vessels for sailors new to catamarans. Production began with the 105M (meaning 10.5 meters), with a design change in 2004 to the 105MC, notable differences being the extended cockpit cover to allow for a full enclosure and a slightly taller mast (while still remaining ICW-friendly). KD 650 I was thinking about this boat as I got the ideas for the KD 650. It is a trailerable, beach, costal cruiser racer. It is a mouth full ;-) But this was the idea. The KD 650. Specifications. LOA hulls-6.50 m without rudders: Beam c/c-3.00 m: Beam catamaran-3.50 m: Beam on trailer-2.00m: Draft hull/rudders-.33/.54 m: Weight empty-340 kg: Weight ... KD860 slideshow Pictures from the KD 860's catamaran construction by amateurs and professionals. In the snow and in the tropical sun. Towards the end sailing pictures too. B... KD 650 Plans KD 650 Plans. The KD 650 is an other approach for an affordable trailer catamaran for amateur construction. The boat is designed for coastal sailing and will have a good turn of speed with its efficient Gunter rig. The boat is easy to build with plywood/glass/Epoxy construction. The first time DIY boat builder will have no problem building the ... CATAMARAN DUO 105 files CATAMARAN DUO 105. The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third-party users. Each CAD and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or real-world item, product, or good it may purport to ... KD 860 Plans KD 860 Plans. These are full plans - for study plans click HERE. This is our smallest offshore cruiser. A sea worthy fast cruiser catamaran for a family of four. The performance of this boat is exceptional on all courses to the wind. To make sure of this, the boat is light and has a low streamlined profile for windward performance. The study ... CATAMARIS Blue Coast 105 sailing catamaran Description. This BLUE COAST 105 combines luxurious comfort on board with seaworthiness and life at sea with its tremendous performance under sail with 729sqm total sail area and engines of 2 x 440 Ps. With long waterlines and a very efficient sail plan, the BLUE COAST 105 can reach speeds of over 20 knots in complete safety and comfort. catamaran gulet motorboat powerboat riverboat sailboat trimaran yacht