I can't remember how to mark a reply as best answer. I'll deal with that out later, when not working from my phone. Anyway, yes, the SS
Edmund Fitzgerald is the ship in question. At the time of her launch, she was the largest Great Lakes freighter in service, and remains the largest to have sunk there. She sank in a November storm on Lake Superior in 1975, and was famously the subject of a Gordon Lightfoot song.