A navigation is a river rendered navigable by the use of weirs and locks.
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Navigation is the process of planning, recording, and controlling the movement of a craft or vehicle from one place to another.
Radar navigation uses radar to determine the distance from or bearing of objects whose position is known.
It is the responsibility of the navigator to choose the procedures applicable to his own situation, to train the piloting team in their execution, and to ensure that duties are carried out properly.
The Polynesian navigators routinely crossed thousands of miles of open ocean, to tiny inhabited islands, using only their own senses and knowledge, passed by oral tradition, from navigator to apprentice.
Early navigators used pilotage, relying on local knowledge of land marks and coastal features, forcing all ships to stay close to shore.
Celestial navigation systems are based on observation of the positions of the Sun, Moon and stars relative to the observer and a known location.
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