A-class catamarans are high-tech single handed constructions restricted by very few rules. This made the A-cat’s the development class, a Formula One in the catamaran world. Boat is 5,5 m long with a rig area of 14 sqm, and weights only 75 kg. Every few years there is a new big step in evolution of the class. Right now nearly every boat is foiling above the water on the hydrofoils on upwind and downwind legs. Speeds frequently exceeds 25 knots. All of the above makes it one of the most exciting class to watch and participate on.