Maritime Transport - Traffic. Any movement of a seagoing vessel at sea. One port traffic (movements of seagoing vessels to offshore installations, or for dumping at sea, or traffic from the sea bed to ports) is included. Fluvio-maritime movements of seagoing vessels are included. Movements on inland waterways between seaports and inland waterway ports are excluded and are included in inland waterway traffic. Movements of seagoing vessels internally, between different basins or docks of the same port, are excluded