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Capable of being navigated.
In law, the term navigable is applied to the sea, to arms of the sea, and to rivers in which the tide flows and reflows.
In North Carolina and in Pennsylvania the navigability of a river does not depend upon the ebb and flow of the tide, but a stream navigable by sea vessels is a navigable river.
By the common law, such rivers as are navigable in the popular sense of the word, whether the tide ebb and flow in them or not, are public highways.