nav·i·ga·tion 
(năv′ĭ-gāshən)
(năv′ĭ-gāshən)n.
1. The theory and practice of navigating, especially the charting of a course for a ship or aircraft.
2. Travel or traffic by vessels, especially commercial shipping.
nav′i·gation·al adj.
nav′i·gation·al·ly adv.