What role does a sextant play in navigation?

A sextant is a critical tool in navigation, primarily used to determine a vessel's latitude and longitude. By measuring the angle between a celestial body, such as the sun or a star, and the horizon, navigators can calculate their position on Earth. The sextant allows for precise angular measurements, which, when combined with time of measurement and celestial charts, enable navigators to pinpoint their geographical location at sea.

The importance of this measurement extends beyond mere position finding; it is fundamental for safe and effective navigation, especially in open waters where other navigational aids might not be available. By determining latitude and longitude accurately, mariners can chart a course to their destination with confidence and adjust their paths as necessary to avoid hazards or change routes.