United States Merchant Marine - Wikipedia
https://en.wikipedia.org/wiki/United_States_Merchant_Marine
WEBThe Merchant Marine primarily transports domestic and international cargo and passengers during peacetime, and operate and maintain deep-sea merchant ships, tugboats, towboats, ferries, dredges, excursion vessels, charter boats and other waterborne craft on the oceans, the Great Lakes, rivers, canals, harbors, and other waterways.
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