33-meter "Mirabilis" Launches At Custom Line The custom 33-meter "Mirabilis" was recently launched by Italian brand Custom Line. She is the latest in the yard's 33-meter Navetta line. The yacht was launched earlier this month (April 5th) and is now in the water being prepared for sea trials. Zuccon International Project worked on the vessel's exterior design as well as the interior. The brief was simply for a vessel that was roomy...one with interior volumes of a 40-meter but not physically larger than 33.5-meters.