Ports serve critical roles as interfaces between sea and land transport and as economic hubs. They facilitate the transfer of freight and people via maritime transport connections to other modes. Ports range significantly in their assets, operations, and functions but generally serve as nodes in multimodal transport networks and distribution centers. Their planning requires balancing economic, engineering, and supply chain concerns over short, medium, and long time horizons. Key port activities involve vessel berthing and cargo handling, while port classifications depend on factors like hinterland served and shipping services provided.