Sea Cat 40 Concept Revealed By Rossinavi Rossinavi just took the veil off a new concept they are presenting to the world. It is called the Sea Cat 40 which as the name suggests it is a power catamaran in the region of 40-meters. Actually the true designed length is 42.75-meters with a spacious 13.75-meter beam. The design on the exterior is by Fulvio di Simoni. The design inspiration is actually taken from phytoplankton which explains the upper exterior surfaces being clad in photovoltaic membrane cells.