LDS, please study this...for this is the true key to the geography of the Book of Mormon you've pondered all these years. (This may be the most important geography test you've ever taken in your forever-conscience lives!!!)
Subject: Smith stealing location names for the Book of Mormon from a Canadian - Northern U.S. map
Also see
My first copy of the bom had a photo section in it with pictures of the great lakes and the caption stating that these were the ‘seas’ referred to in the bom. Unfortunately I lost that edition with all the moving I’ve done. I’d love to get another copy of that. Have you seen the edition I’m talking about?