This link offers a comprehensive list of ports and links to their web pages. As with all the links, a descriptive synopsis of the pages will allow you to decide if the page is one you would like to visit, ultimately saving you time. In addition to ports, there is a list of intermodal facilities and intermodal service providers. Finally the page offers links to Maritime-related trade associations. The link contains government sources as well as industry provided statistics.
Some sites offer free access while others require membership or a fee to access the page.
Links are not divided into subcategories, but as more sites are compiled they will be organized into groups. When you need official information from government agencies and organizations, this link will take you where you want to go. Sites featured here explore Maritime law and legal issues as well. While you're in this area, you also can search through job opportunities available in the Maritime industry. This link offers information about and links to Maritime Academies and Colleges.