The Edmund Fitzgerald was loaded with 26,000 tons of pellets containing iron ore when it sank. To slip through the narrow Soo Locks, such ships are only 75 feet wide. "That's less than the space from home plate to first base," Bacon observed. "What's the problem with that? They can't handle rough seas." And the Great Lakes do get rougher over the winter, even more so than the ocean. Salt helps regulate and weigh down waves, so freshwater waves can become huge and erratic. The Edmund Fitzgerald was caught in a savage storm with hurricane-force winds around 100-mile-an-hour and waves up to 60 feet, crashing down on the freighter every four to eight seconds, says Bacon.