Rossi Navi unveils 48-meter motoryacht design Rossi Navi has unveiled a new design for a 48-meter tri-deck megayacht. It is being called the Palladium 48 and is characterized by the generous utilization of glass in the design. For a sub 50-meter megayacht, she is very spacious both on the interior and on the exterior decks. The aft decks are particularly spacious. From the main aft deck, broad stairs travel down to a sizable swim platform.