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SV Trinity34' Performance Cruising 105 MC 2003

$ 94,000

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United Yacht Sales is pleased to assist you in the purchase of this vessel. This boat is centrally listed by S&J Yachts. It is offered as a convenience by this broker/dealer to its clients and is not intended to convey direct representation of a particular vessel


  • Price USD:$ 94,000
  • Builder:

    Performance Cruising

  • Model:

    105 MC

  • Year:


  • Location:

    Port Charlotte, Florida, United States

  • Type:

    Sail Yacht

  • LOA: 34 ft in
  • Display Length: 34 ft
  • Beam: --
  • Yacht Category


  • Water Capacity: --
  • Fuel Capacity: --
  • Days on Market:

GEMINI 105 MC 2003



Gemini 105 Mc,Trinity, hull no.800, 2003 Miami Boat Show model. USCG Documented vessel No. 1137369



With 3 decades of experience the builders of the Gemini 105MC have produced a tried and tested, modestly sized, family cruising vessel with more stowage space and room to live aboard, than anyone might expect of a vessel of this size. The Gemini 105MC is an ideal choice of vessel for the weekend sailor but is also an ideal candidate to take that Sabbatical to the islands we all dream of. She is an easy to sail vessel and houses enough room for the whole family.


One owner since 2003 Continuously maintained and improved with records.  

Price: $94,000

Located: Charlotte Harbor Boat Storage, Placida FL.

239 898 9444, 


Included Accessories 

Full isinglass cockpit enclosures (new condition)

Full cockpit screen enclosures (new condition)

Hammock Seat with custom easy removal feature

Wave Rider bow seats 




Screecher, Genoa, Fully battened Main



Standing Rigging replaced Feb 2018

New Lexan windows 2021

Prop Guard on Silette Drive. (Crab pot protection)

Dual switchable Racors on fuel line. Emergency filter swap.

Lofrans Windlass, Large open frame Cleats on bow, extra cleats on stern for dinghy control.

270 Watt Solar Panel, Kyocera, KU270-6MCA, 2017

4 Optima 55AH batteries 2010 and 2016

Blue Sky Solar Boost 1524iX MPPT Charge Controller 2017

PROwatt Inverter 1000 watt 

Dometic RM2451 Refrigerator 2007

Hulls modified to eliminate wave slapping noise at anchor


Ground Tackle

4 Anchors with chain and 1/2 in nylon rode flaked in buckets for fast deployment

Delta 35 lb. Plow On Bow Roller, 50 ft. of 5/16 BBB chain, 200 ft nylon rode

Bruce 22 lb. In Anchor Locker with chain and rode

35 Lb CQR hinged plow with chain and rode in sail locker

25 Lb. Danforth with chain and rode in sail locker

Anchor Bridle, 

300 ft of 1/2” nylon line in 4 coils for mangroves



AB 10.5 ft RIB with 3.5 hp Mercury 2 cycle motor

Dinghy Chaps in Coast Guard Orange

Davits have 6 part blocks with cam cleats for easy lifting 



Garmin. GPSmap 541s



VHF Standard Horizon GX2150

ICOM M7000 PRO. Short Wave radio (not connected)

Sirius XM receiver


Spare Parts and Tools on Board

Propeller (reconditioned)

Alternator (used)

Main Sail cover (new)

Stilette yoke (used)

Spare Steering cables, port and starboard (new)

Silette Drive Leg Parts kit, includes spare rubber bellows.

Raw water parts, impellers, zincs, gaskets, end bells for exchanger,

Fuel Polishing tool, electric fuel pump, water separator, wand, etc.

Oil change Kit: hand pump with threaded fitting, hose 

Steering system: oil infuser tool for cables

Yoke pin removal tool. engine alignment tools

Grease gun, manual, for Silette maintenance 


Miscellaneous Equipment

Fenders, Fender Boards, Mounted Gusher Manual Pumps, one large one small. Rain tent, Foldable wheeled carrier, 4, 20 lb. Propane tanks, Firdell Blipper Radar Reflector, Marriage Saver intercom headsets,



·        (OPENING PARAGRAPH): A short overview of the boat that tries to “hook” the MLS browser into wanting to learn more.

·        MECHANICAL, ELECTRICAL AND PLUMBING (a list of items that fall into this category, engines, air con, generators, invertors, water heaters, water makers, etc.)

·        HULL, DECK, RIGGING AND SAILS (gear on deck, in cockpit, canvas, winches, windlass, anchors, sail inventory, etc.)


·        SAFETY AND CONVENIENCE (flares, PFD’s, microwave, trash compactor, spares, etc.)

Some items may fall into more than one category, so I list them in both places (in case someone is only looking at the one spot for gear).


Our cruising with TRINITY over the past 20 years has mainly been around South Florida, although we did make a trip up to the Chesapeake Bay early on. We spend a lot time on anchor or mooring balls and are rarely in marinas. The boat is stored on land during the summers. I designed the dual switchable fuel filter assembly to overcome the problem of filter plugging in rough conditions such as high speed wakes stirring up sediment in the fuel tanks. The fuel polishing device was designed to remove water and sediment from the fuel tanks. It’s electric fuel pump plugs into a cigarette lighter receptacle and has an on-off switch on the device. The semirigid wand is pushed down the fuel tank fill pipe. A bulb pump in line primes the fuel pump, fuel is returned to the tank after passing through a water separator. Bubbles of water are visible in the clear tubing allowing you to move the wand to the most productive location in the fuel tank. By the way, the fuel pump on the polisher can replace the engine lift pump in case of failure.

Anchoring improvements include the manual windlass with which I can maintain adjustable tension on the anchor chain as it is being deployed with the boat in reverse. To pull the anchor I usually pull the chain in by hand as Linda motors forward, until almost over the anchor. Then I use the windlass to tension the chain. Finally I attach the permanent chain hook which is attached to the anchor cleat, slack off the windlass, then Linda throttles up over the anchor breaking it out. Then the windlass pulls the anchor onto the bow roller and the chain hook is reattached to the chain and the anchor is securely tied down. The manual windlass is light weight without requiring bow mounted batteries or switches. 

While sleeping aboard at anchor I would be aware of small waves slapping the hull. Any change in the noise would wake me up. I modified the hulls to deflect the wavelets and quiet the boat. These features are labeled “Wave slap silencers” in the photos.

I replaced the original smallish bow cleats with large bow cleats to facilitate the bridle on the anchor rode. The bridle lessens the tendency of the catamaran to tack back and forth in a breeze. I use a large wood pin to attach the bridle to the nylon rode. This arrangement is much easier and quicker to detach than knotting the bridle to the rode. The original bow cleats were moved to the stern to attach dinghy lines which keep the dinghy stable in good sailing weather. 

The sail locker and the port and starboard lazarettos, as built, have plywood floors painted with gel coat. I bonded fiberglass over the gel coat to protect that floor from leaking into the living spaces. I have painted the insides of hatches and covers to make mold cleaning much easier. The cockpit floor is covered with Dri-Dek tiles which keep footing secure even when rain or seas are wetting the cockpit. They also keep leaves from plugging up the cockpit drains during lay-up. 

We carry extra diesel fuel in five, 5 gallon containers stored in the lazerettes. The containers allow us to transport fuel to the boat without having to move to a fuel dock. We also use the containers to filter the diesel into the main tanks through a Baja filter. We use a 4 part block and tackle off the boom to raise the container and fuel is siphoned into the filter. No fuel dock fuel goes into the tank without being Baja filtered. I use an aluminum bar as a fuel gage since the factory gages never worked. The bar Is painted for easy reading. The calibration is 1.66 gallons per inch of level. 10.5 inches is full. 

I have custom designed lower-able screens on the windows on each side of the cabin door. All the screens are no-seeum proof, a real necessity when anchoring in unpopulated areas like Little Shark River.

The original Dometic refrigerator failed and was replaced in Dec. 2007. In Dec. 2013 The fan over the cooling coils failed. I replaced the noisy cobbled up fan with two computer fans connected in series, which draw 0.19 amp. More air flow, less noise and power drain.

I have a port and a starboard steering cables as spare parts. There is a description how to maintain and lubricate steering cables. Special tools are included and described. 

The original 2 solar panels have been replaced with a single full width Kyocera 270 watt panel. A Blue Sky Solar Boost MPPT Charge Controller 1524iX efficiently charges the 4 AGM batteries. LED lights have replaced the original main salon lights. More light for less power. 

And on and on. 



Tom Jessop

Engine and generator hours are as of the date of the original listing and are a representation of what the listing broker is told by the owner and/or actual reading of the engine hour meters. The broker cannot guarantee the true hours. It is the responsibility of the purchaser and/or his agent to verify engine hours, warranties implied or otherwise and major overhauls as well as all other representations noted on the listing brochure.

The company offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change or withdrawal without notice.