navigations
The navigation of a ship or an aircraft is the act of deciding which course to follow and steering it.
The expedition was wrecked by bad planning and poor navigation.
这次探险因计划不周和导航不利而失败。
You can refer to the movement of ships as navigation.
Pack ice around Iceland was becoming a threat to navigation.
冰岛周围的浮冰一度成为船舶航行的威胁。