Navigation is the theory and practice of navigating, especially the charting of a course for a ship, aircraft, or spaceship (American Heritage Dictionary). Navigation may also mean:

A synonym for ship transport in general.

A navigator is the person onboard a ship or aircraft responsible for its navigation. The navigator's primary responsibility is to be aware of ship or aircraft position at all times. Responsibilities include planning the journey, advising the Captain or...

Navigation research, which deals with the fundamental aspects of navigation

A river rendered navigable by the use of weirs and locks

It is used as a synonym for canal for example Birmingham Canal Navigations

In the WWW and information systems the process of goal-directed locating and traversing hyperlinked information, browsing