Some of the busiest ports in the U.S. are around the Great Lakes, and last weekend, a group of people who understand just how important Great Lakes shipping is gathered to pray for calm seas and safe voyages.
The SS United States is about as long as three football fields laid end to end and had more than 400 passenger rooms.
Their work includes tying ships to the shore, unloading containers and vehicles and keeping track of everything that comes off.
Engineers plan a fully self-driving cargo ship by the end of the decade.
