Construction Begins On UP40 Crossover By Antonini Navi Work has started in earnest on the UP40 from yacht builder Antonini Navi. The yard has a range called the UP40 which means Utility Platform 40. It is basically one 40-meter steel hull which the owner can choose three superstructure styles optimized as either an Explorer, Motor Yacht and in this case, Crossover. The first hull to go under construction, the Crossover variant is being started on spec with the aim of finding an as the build progresses. The design is by Fulvio di Simoni naturally in concert with the yard's engineering team.