“St. Christopher” used five plates printed onto navigational charts. These charts were used in navigation of Foss tugboats.
St. Christopher is the patron saint of travelers and sailors. He was a giant who offered to carry a child across a rushing river. When, halfway across, he began to struggle under an unbearable weight, the small child, revealed to be Christ, explained that St. Christopher was holding the weight of the world and responsibility for its safe passage as he crossed the river.