Creator
- United States. National Oceanic and Atmospheric Administration11
- Coastal Services Center (U.S.)6
- United States. Department of Commerce6
- United States. National Ocean Service6
- United States. Bureau of Transportation Statistics3
- Waterborne Commerce Statistics Center (U.S.)3
- Institute for Water Resources (U.S.). Navigation Data Center2
- Navarro, Fernando2
- Powell, Susan2
- Vanderbilt Engineering Center for Transportation Operations and Research2
- National Center for Ecological Analysis and Synthesis1
- United States. Bureau of Transportation Statisticsf1