The ports can be categorized into four broad categories: deep draft, inland, coastal, and developing. The majority of the Louisiana ports are considered shallow-draft inland or shallow-draft coastal ports. Generally, the shallow-draft inland ports are cargo and/or industrially based while the coastal ports serve as industrial sites for water-related industries, for servicing the offshore oil and gas industry, and for commercial fishing in the Gulf of Mexico. The six deep draft ports in the state transfer large quantities of port related cargo and routinely rank among the top tonnage ports in the country according to the USACE (Waterborne Commerce of the United States. 2006).