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A '''Tramp line''' (from which is also derived the phrase "tramp steamer") is an ocean carrier company operating vessels not on regular runs or schedules. They call at any port where [[cargo]] may be available.<ref>U.S. Department of Transportation Maritime Administration [http://www.marad.dot.gov/publications/glossary/glossary.html]</ref>
==References==
<references/>
[[Category:Shipping terms]]