Dr. Stone: Ryuusui

With the conflict between the Kingdom of Science and the Empire of Might settled, Senkuu chooses a goal larger than Japan: cross the ocean and reach the source of petrification. He can build the ship, but he needs someone who can command it, so the group revives Ryuusui Nanami, a former heir and expert sailor with enough confidence and ambition to fill an ocean. Ryuusui agrees, but the voyage first requires fuel. The search for oil leads to aerial mapping and exploration of land no awakened human has crossed for thousands of years. Navigation, aviation, and even economics enter the Stone World, proving that Ryuusui's enormous ambition can be remarkably useful when it points in the same direction as science.