The Engineer Who Built the Titanic's Fatal Flaw — Then Sailed On It

The man who designed the Titanic knew it would sink the night it hit the iceberg. He had the numbers. He ran the calculation in minutes. And instead of getting on a lifeboat, he walked the ship helping strangers escape. This is the story of Thomas Andrews — the brilliant Belfast engineer who led the Titanic's design, sailed on her maiden voyage as part of the builder's guarantee team, and stayed behind when the water rose. In this video we look at the flaw built into the ship's watertight compartment system, the pressure and trade-offs that shaped it, and the quiet, devastating final hours of one of history's most overlooked figures. If you've ever wondered what it feels like to know something is going wrong and not be able to stop it — this story will stay with you. Like and subscribe if you want more real stories from the people behind history's biggest events. New video every week.