There's a very intriguing podcast episode by Stuff You Should Know about the Edmund Fitzgerald. I would definitely recommend giving it a listen to anyone who is interested in the story of the wreckage.
They also touched on how Lightfoot modified the lyrics in his song to reflect new findings, which was a very kind thing of him to do, especially when you consider that many families lost loved ones in the tragic accident.
If not, maybe not. But it's what you want to listen to while reading this article.