I was looking at a map of a shipwreck off Nantucket and saw to the south what looks like a range of underwater mountains, or an archipelago of underwater islands, off the continental shelf. Google isn’t coming up with any names or descriptions for me; it’s not the Mid-Atlantic Ridge.
Here’s one point on the range
If the link doesn’t work, it’s visible on google maps satellite view, roughly 500 miles east of the Delmarva peninsula, 350 miles south of Nova Scotia and around 500 miles north of Bermuda. It seems to extend several hundred miles.