internal navigation

Navigation \Nav`i*ga"tion\, n. [L. navigatio: cf. F.
   navigation.]
   1. The act of navigating; the act of passing on water in
      ships or other vessels; the state of being navigable.
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   2.
      (a) The science or art of conducting ships or vessels from
          one place to another, including, more especially, the
          method of determining a ship's position, course,
          distance passed over, etc., on the surface of the
          globe, by the principles of geometry and astronomy.
      (b) The management of sails, rudder, etc.; the mechanics
          of traveling by water; seamanship.
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   3. Ships in general. [Poetic] --Shak.
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   {Aerial navigation}, the act or art of sailing or floating in
      the air, as by means of airplanes or ballons; aviation;
      aeronautic.

   {Inland navigation}, {Internal navigation}, navigation on
      rivers, inland lakes, etc.
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