Migaloo M5, a 165.8-meter private submersible super yacht concept designed to operate both on the surface and beneath the sea. According to its creators, the vessel is engineered to dive to depths of around 250 meters and remain submerged for up to four weeks, offering an unprecedented level of privacy and security. The concept blends classic superyacht luxury with submarine capability, allowing the yacht to transform into a secluded underwater retreat. Design renderings and specifications highl