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Moth International
Designer: Open  ·  Builder: Various  ·  First built: 1928
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About the Moth International

Few sailing dinghies have undergone such a radical evolution as the Moth International, a class that has transformed from a simple plywood skiff into one of the most technically advanced foiling craft on the water. Governed by a measurement rule rather than a strict one-design formula, the Moth allows builders and sailors to experiment freely within defined parameters, making it a hotbed of innovation that has influenced modern sailing technology far beyond its own class. Today, the modern foiling Moth is almost exclusively a performance racing machine, lifting entirely out of the water on hydrofoils to reach exhilarating speeds that were once unimaginable for a single-handed dinghy. It demands exceptional skill, fitness, and reflexes, making it a favourite among elite sailors and those passionate about pushing the boundaries of what a small boat can do. For prospective buyers, the Moth is not a casual weekend sailor — it rewards serious commitment and practice. However, for those willing to invest the time, it offers an unmatched sailing experience and a vibrant, passionate global racing community.

Core Dimensions
LOA (Length Overall) 11.00 ft / 3.35 m
LWL (Waterline Length) 11.00 ft / 3.35 m
Beam 7.38 ft / 2.25 m
Displacement 57.32 lb / 26 kg
Design & Construction
Hull Type Foiling Monohull
Rigging Type Cat (Marconi)
Construction Various materials
Designer Open
Builder Various
First Built 1928
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Performance Ratios
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
19.23
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1.74 pounds/inch
Rig Dimensions
I (Foretriangle Height) 95.56
P (Mainsail Luff) 88.80 ft² / 8.25 m²
E (Mainsail Foot) 19.23
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