BoatsGemini 105M

Gemini 105M

Catamaran, twin centreboards · Masthead Sloop · 1995–2000

A Tony Smith-designed catamaran with twin centerboards, offering a high sail-area-to-displacement ratio for agile cruising

Designed by Tony Smith, built by Performance Cruising Inc.

LOA
Beam
Draft (max)
Displacement
Hull type
Catamaran Twin Cbrd.

See her sail

The Gemini 105M, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Practical Sailor

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

Shoal draftDraws 0.46 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LightHeavy

112 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 112
EasygoingPowered-up

20.5 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.5
  • Draws more than ~75% of boats her size on file
  • Narrower than ~93% of boats her size on file

Compared with 168 boats of the same type within a quarter of her length.

What the fleet has seen

The Gemini 105M, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The Gemini 105M is a 10.2-meter masthead sloop catamaran designed by Tony Smith and built by Performance Cruising Inc. between 1995 and 2000. It features a Catamaran Twin Cbrd. hull with a 4.3-meter beam and a 1.5-meter draft, displacing 3628 kg. The DL variant includes a Westerbeke diesel engine connected to a retractable inboard/outboard leg. The Gemini 105MC, a similar model, is noted for its affordability, shallow draft, and trailerability, fitting into standard marina slips due to its 14-foot beam.2:31 Its retractable centerboards allow the draft to vary from 1.5 to 5.5 feet, enabling access to shallow anchorages.4:37 A rotating mast and 150-percent genoa aid performance, while a retractable amidship outboard engine enhances maneuverability.5:14 The interior includes a U-shaped dinette, a full galley in the port hull, and a head with a shower in the starboard hull.3:41 Buyers should inspect older models for water intrusion, rigging condition, and fiberglass stress cracks.6:10

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Basemap © Wikimedia Commons · CC BY-SA 4.0

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
20.5
Displacement / length
111.6
Hull
Hull type
Catamaran Twin Cbrd.
Construction
Fiberglass
Production
Years built
1995–2000
Units built
110
Designer
Tony Smith
Builder
Performance Cruising Inc

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Gemini 105MC10.21 mSame hull familyNear-identical lengthA versatile cruising catamaran featuring a cockpit that converts with canvas or solid panels for all-weather comfort
Dragonfly 3510.68 mSame hull family0.5 m longerA high-performance trimaran with a rotating fractional rig and a 34.54 SA/D ratio built for rapid, stable cruising
Prout Ltd. Snowgoose 37 Elite11.28 mSame hull family1.1 m longerA wide-beamed cutter-rigged catamaran from a prolific series with over 500 hulls built for shoal-water cruising

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

Keep asking

The fleet has more to say

Search what's been said about the Gemini 105M, or ask a specific question — the answer comes back written out, with links to the moments it draws on.

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