Downloadable Statistics (pdf) | Definitions Pertaining to Statistics
AAPA continuously receives requests on how ports rank nationally and internationally. The question is ambiguous, however, since ports can be compared in many different ways – by volume or value of trade, number of cruise passengers, revenues, and storage capacity, as examples.
Moreover, sheer size of a port, in terms of traffic flow, says nothing about productivity, efficiency, or responsiveness to customers. These are just some of the criteria that a shipper might consider in evaluating port performance.
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Definitions Pertaining to Statistics
TEU = “Twenty-Foot Equivalent Unit,” a standard linear measurement used in quantifying container traffic flows. As examples, one twenty-foot long container equals one TEU while one forty-foot container equals two TEUs (i.e., 40'÷ 20' = 2).
TONS = A short (or “net’) ton = 2,000 pounds
A long ton = 2,240 pounds
A metric ton = 2,205 pounds
|
CONVERSION TABLE |
||
|
TO CONVERT |
INTO |
MULTIPLY |
|
Long Tons |
Short Tons |
1.12 |
|
Long Tons |
Metric Tons |
1.016 |
|
Metric Tons |
Long Tons |
0.9844 |
|
Metric Tons |
Short Tons |
1.1025 |
|
Short Tons |
Metric Tons |
0.907029 |
|
Short Tons |
Long Tons |
0.89287 |
VESSEL SERVICE:
Liner = cargo carried in vessels according to a fixed scheduled of routes and port calls. Most containerized, as well as some breakbulk cargo, falls in this category.
Tramp = Dry cargo carried on chartered vessels. Includes mainly dry bulks such as coal, grain, and fertilizers, as well as steel and, in some cases, autos.
Tanker = Bulk liquid cargo, such as crude oil, carried on tanker vessels.
