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> | 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> |