A striking mast and her own submarine were just two of the specific requests by an owner who has enormous experience of discovering the world by sea. Like every genuinely custom superyacht, the design for Shinkai revolved around how best to incorporate a 7.2-tonne submarine on the aft deck along with the giant crane required for launch and collection. Taking this as the starting point, Vitruvius and Feadship developed a 54.90-metre explorer yacht capable of remaining self-sufficient and fuel-efficient while travelling the world.