Coastwise
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
Vessels "plying coastwise" are those which are engaged in the domestic trade, or plying between port and port in the United States, as contradistinguished from those engaged in the foreign trade, or plying between a port of the United States and a port of a foreign country.
San Francisco v. California Steam Nav. Co.., 10 Cal. 504.