Tons
Maritime
The tonnage figures provided throughout the Waterborne Commerce of the United States, WCUS, Parts 1-5 represent short tons (2000 pounds).
Where noted, tonnage figures are rounded to the nearest thousand tons. A zero represents less than 500 tons but more than zero. Dashes mean zero tons. Columns and rows may not add up exactly to totals and subtotals due to rounding.
- — Inland Waterways Audit Techniques Guide retrieved 2014-05-31