NAVIGATION. The act of traversing the sea, rivers or lakes, in ships or other vessels; the art of ascertaining the geographical position of a ship, and directing her course. 2. It is not within the plan of this work to copy the acts of congress relating to navigation, or even an abstract of them. The reader is referred to Story's L. U. S. Index, h.t.; Gordon's Dic. art. 2905, et seq.