The term referred Capesize cargo ships, their size does not allow the Suez Canal and thus to pass also the much smaller Panama Canal, and are therefore forced to travel between the oceans around Cape Horn or the Cape of Good Hope.

Regardless of the current limitations of the two major waterways fall today (20? ) Exclusively bulk carriers with the greatest capacity and supertankers of classes VLCC ( Very Large Crude Carriers ) and ULCC (Ultra Large Crude Carrier) in the capesize category.

Since the extension of the Suez Canal in 2009 also ships these classes can pass through the channel if their depth is less than 20.1 m.