Majority of ship movements from inland navigation
Willem Serré: "Of all ship movements, 85% are accounted for by inland vessels. This is entirely normal, as they call at multiple terminals. Ocean-going vessels, such as car carriers, container ships, or tankers, made 47,252 movements last year, representing 15%. These ships require significantly more planning. A tanker is often less well-equipped to maneuver in the docks than a container ship, which calls at multiple ports. From a certain length onwards, tankers are therefore required to sail with a dock pilot and one or more tugboats."