The Corsier Bay Nautical Club (CNBC) offers catamaran lessons for adults and juniors, a section for sailors, regattas and sailing events. All this in a friendly atmosphere. Coolcatschool is the sailing school of the Club Nautique de la Baie de Corsier. It is made up of volunteers and catamaran fans who like to share their passion and live it together in complete safety. Geneva, Switzerland.