Hidden Shape
The shape of the American fleet.
916 American boats across 11 archetypes, four coastlines, and the deepest one-design backbone in offshore racing. Here's how they cluster, and what the collective signature reveals about how America races.
America's fleet is balance-first, not brute-force displacement. KEELFLEX leads at 26.4% (242 boats) — the narrow-stability platforms that reward precise trim, a profile shaped by the Johnstone-heavy J/105, J/109, J/111 and Farr 40 programs that define American club racing. AEROMAX anchors the power-efficiency tier at 17.2% (158), and BALANCECORE carries the heel-sensitive, wide-envelope contingent at 13.0% (119). The long tail spans all eleven archetypes across the four-coastline mix.
- KEELFLEX 26.4% · 242 boats
- AEROMAX 17.2% · 158 boats
- BALANCECORE 13.0% · 119 boats
Dimension emphasis: Crew · Sail Performance
In 2026, the American fleet races across a calendar spanning the Caribbean 600 in February, the Transatlantic line in May, and the ORC North American Championship in San Francisco in September — this geographic breadth converted into a three-event arc.
Keelflex
Narrow stability window; fast when perfectly balanced, punishing when not.
Boats 242
Share 26.4%
Aeromax
Power-efficiency hybrid with strong upwind drive and moderate displacement.
Boats 158
Share 17.2%
Balancecore
Heel-sensitive platform with a wider, more forgiving performance envelope.
Boats 119
Share 13.0%
Headforce
High righting moment, upwind-biased hull that powers through chop.
Boats 50
Share 5.5%
Deepframe
Deep-hull efficiency paired with a stiff platform for drag-optimised flow.
Boats 42
Share 4.6%
Gravityrun
Heavy-mode momentum boat with strong downwind power in sustained breeze.
Boats 33
Share 3.6%
Stormline
Rough-water specialist with a hull shape optimised for steep, short waves.
Boats 31
Share 3.4%
Aeroblade
Light, agile platform optimised for quick acceleration and flat-water speed.
Boats 15
Share 1.6%
Ironwind
Stiff, stable-drive platform with predictable load behaviour.
Boats 10
Share 1.1%
The American fleet's hull signature is balance-first, not brute-force displacement. KEELFLEX leads at 26.6% — narrow-stability platforms that reward precise trim, a profile shaped by the one-design-heavy backbone of J/105s, J/35s, and Farr 40s that define American club racing. AEROMAX at 17.3% and BALANCECORE at 13.0% round out a power-efficiency core that spans the four-coastline mix. The long tail — GLIDEFORM, STEELFORM, HEADFORCE, DEEPFRAME — captures the breadth of American offshore culture, from Atlantic displacement boats to Pacific innovators, Gulf Coast dual-purpose programs, and Great Lakes short-summer-season specialists.
Archetypes in the American fleet, grounded in real platforms.
Narrow-stability platforms that reward precise trim and crew work.
- J/111Alan Johnstone / J/Boats
- J/109Rod Johnstone / J/Boats
- Farr 40Farr Designs
American KEELFLEX boats cluster on the J/Boats and Farr 40 one-design backbone — recognise any of them and you know what KEELFLEX feels like when the trim window is narrow and the crew has to find it.
Power-efficiency hybrids that favor medium-air transitions.
- J/120Rod Johnstone / J/Boats
- First 40.7Farr / Beneteau
- C&C 115Tim Jackett / C&C Yachts
American AEROMAX boats cluster on platforms like these — the medium-air specialists that make up the second tier of the four-coastline fleet.
Heel-sensitive platforms with wide, forgiving performance envelopes.
- J/105Rod Johnstone / J/Boats
- Swan 42Frers / Nautor's Swan
- C&C 30Mark Mills / C&C Yachts
American BALANCECORE boats cluster on platforms like these — the forgiving-envelope racers that reward consistency over trim-window precision.