What symbol is used to denote a celestial fix in navigation?

In navigation, a celestial fix is represented by a circle. This symbol is significant as it indicates the precise position determined by celestial observations, such as the location of the sun or stars against a horizon. When navigators calculate their position using celestial bodies, they create an area of uncertainty known as a "circle of position," with the actual celestial fix being a point within this circle where the navigator's line of position intersects. The use of a circle effectively communicates the method of triangulating a position based on multiple celestial sights, allowing for an understanding of both accuracy and variability in the fix obtained.

Each of the other symbols mentioned has distinct meanings in navigation, but only the circle is specifically associated with the celestial fix, representing the interconnectedness of observed celestial bodies and the navigator's position on Earth.