A vessel is '''underway''' when it is not at anchor, made fast to the shore, or aground.<ref>U.S. Department of Transportation Maritime Administration [http://www.marad.dot.gov/publications/glossary/glossary.html]</ref>
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A vessel is '''underway''' when it is not at anchor, made fast to the shore, or aground.<ref>[http://www.marad.dot.gov/publications/glossary/glossary.html U.S. Department of Transportation Maritime Administration]</ref>