🌊 The Secret of the Plimsoll Line — The Mark That Saved Thousands of Lives Ever noticed that mysterious line on a ship’s hull? ⚓ That’s the Plimsoll Mark, invented by Samuel Plimsoll — the man who made shipping safer forever. In the 1800s, greedy shipowners used to overload vessels just for profit, risking countless lives. Plimsoll fought back… and his simple line became a global symbol of safety. 🚢 Today, every ship still carries his legacy — that small mark that decides whether it sails safe