Among the boats that shimmered in the heat at the Cannes Yachting Festival last weekend, one vessel stood out. Kohuba has the sleek lines and colouring of a killer whale, and five cabins appointed to the standard of a palace hotel. The underside of its macassar ebony dining table is wrapped in the same shade of leather that encases the door handles throughout the interior. The exotic wenge timber floors are as lustrous as those of a Côte d’Azur ballroom.