[cyclotic]

1,000 ft ore carriers have been plying the Great Lakes for decades. Their size is limited by the Soo Locks.

[Eric in the Ozarks]

And 28 foot draft.

[IronJack]

1,000 ft ore carriers have been plying the Great Lakes for decades.

And there is a lot of tonnage at the bottom of the Great Lakes too.

There is no such thing as an unsinkable ship.