Isotope Catamaran
Sailing for Fun. Racing to Win.

Technical Specifications
(Detailed pictures available late Oct.)
• LOA 16'
• Beam 7' 4"
• Draft 6" to 2' 6"
• Sail Area 185 sq'
• Main Sail 140 sq'
• Jib Sail 45 sq'
• Mast height 26'
• Boom 8' 6"
• Weight (all up) 275 lbs.

Standard Boat Package
Rigging & Parts

Optional Equipment

Price List / Order Form
Reference Chart For Fittings
Pre-Owned Boats For Sale
Isotope Manual


The Isotope is a very fast boat. Beware! Once you've sailed an Isotope, sailing anything else feels like some kind of slow motion time warp. And on those windless racing weekend in July and August, it is the only moving boat on the water...

I'm a new owner of an experienced boat. An experienced sailor is teaching me the ropes. I love the boat, especially its relentless will to fly! It's an exhilirating time, a wonderful boat - more like a partner than property... Read more!


The Isotope Catamaran is a registered Formula 16 boat!
The hulls meet the 16ft LOA requirements of the Formula 16HP class. The strong points of the Isotope are that its balanced helm allows it to out point any other catamaran to windward. An Isotope meeting the One Design class specifications can be raced as a single handed Formula 16 boat. An Isotope with a spinnaker can be raced with crew in the Formula 16 one up class.



Standard Boat Package

• Righting Bar ™ *
• Storage Hatches on Both Hulls
• Kick-Up Rudders
• Sealed - Rotating Mast
• Internal Main Halyard
• Jib Furler
• Jib Barber Outhaul
• Single Line Roller Mainsail Traveller
• White 5oz. Dacron Sails
• Sail Bags
• Color Choice for Stripe/Hull/Deck
• Self Tending Pivoting CTBDS, Friction Lock *
• Tiller Extension
• Hinged Mast Base for Easy Stepping
• Roller Clew Outhaul
• Adjustable Jib Leads
• Color - Coded Lines
• Positive Flotation
• Jib Window
• Ash Battens
*Exclusive to IFG Designs

Optional Equipment

• Customized Trailer
• Trailer Cradle
• Leeward Cleating
• Adjustable Trapeze
• Mast Limiter
• Multi-Color Sails
• 2 Color Stripe
• Radial Cut Sail-Pin Top or Square Top
 (in place of standard sails)**
• Mast Rest
• Wind Indicator & Mount
• 3" Ratchet Cheek Blocks (Jib)
• Trapeze Harness
• FRP Battens
Telescoping Tiller w/Tiller Return ™
** If sails bought separately call for quote.

hull customization available

Custom Fiberglass International    P.O. Box 1976    Wake Forest, NC 27588    919-521-5079 or 919-554-1763

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