Short Sea Shipping: The modern terms short sea shipping and marine highway refer to the historical terms coastal trade, coasting trade and coastwise trade, which encompass the movement of cargo and passengers mainly by sea, without directly crossing an ocean. Deep sea shipping, intercontinental shipping or ocean shipping refers to maritime traffic that crosses oceans. While 'short sea shipping' is the European-developed term, 'marine highway' is the American-developed term currently used. Historically, many developed English speaking countries used the British term ‘coasting trade', and its usage remains.
Roughly 40% of all freight moved in Europe is classified as Short Sea Shipping, however, the greater percentage of this cargo moves through Europe’s heartland on rivers and not oceans. The term Short Sea Shipping has evolved to include point to point cargo movements on inland waterways as well as inland to ocean ports for trans-shipment over oceans. In Europe the main hub of short sea shipping is Rotterdam, also the largest European port, with Antwerp as a second.
The Great Lakes: The Great Lakes are a collection of freshwater lakes located in northeastern North America, on the Canada–United States border, which connect to the Atlantic Ocean through the Saint Lawrence Seaway and the Great Lakes Waterway. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth containing 21% of the world's surface fresh water. The total surface is 244,106 square km. and has evolved as a major source of trade through this area.