Catamaran A-class
For more information: http://www.afcca.org
The main argument to choose the A-class is the freedom of the gauge. Everything that is not forbidden is allowed, it is a great support for all designers and builders. Lightness, thinness in the bar, heading upwind, lack of spinnaker provides amazing sensations!
Here is a video on groix island. The black tape on the portside hull is used to analyze the height of the freeboard required for my A-class project.