First shown at the 2025 Genoa Boat Show, the CY560 SEDAN represents an evolution of the CY540WA model, featuring a redesigned deck layout that introduces a closed hardtop, resulting in a significant shift in weight toward the upper sections. Our work focused on analyzing the stability report, assessing the impact of the new masses on the vessel’s stability, and verifying compliance with the requirements of Directive 2013/53/EU.