Trapped on a Raft With 3 Girls, My Hidden Engineering Knowledge Built a Floating Civilization

Support the channel and watch episodes early: 👉 [Patreon -   / manhwa_voice   ] After surviving a deadly shipwreck, brilliant naval engineer Han Do Yoon awakens aboard a collapsing wooden raft drifting through an endless ocean alongside three strangers who are only moments away from throwing him overboard to save their remaining food and water. Instead of panicking, Do Yoon notices what no one else can—the raft itself will fall apart within hours. Using modern engineering, shipbuilding, and survival knowledge, he gradually transforms the fragile raft into a reliable floating home, salvaging wreckage, building new pontoons, producing fresh water, and creating everything needed to survive in the middle of the sea. As more survivors begin arriving—shipwrights, merchants, navigators, doctors, craftsmen, and refugees fleeing endless wars—a tiny raft slowly grows into a thriving floating settlement complete with shipyards, workshops, warehouses, a hospital, docks, and its own community. But as their city expands, news of the impossible sanctuary spreads across the ocean, attracting the attention of powerful maritime kingdoms that refuse to tolerate an independent haven beyond their control. An epic kingdom-building fantasy about naval engineering, shipbuilding, maritime trade, survival, floating cities, leadership, and one extraordinary engineer who proves that a true home can be built even in the middle of an endless sea.