A line of position created by sighting two charted objects in a direct line is known as what?

A line of position formed by observing two charted objects aligned directly is referred to as a range line. This concept utilizes two distinct points to create a visual aid for determining a vessel's position on a navigational chart. When both objects are aligned, it indicates to the navigator that the vessel is on a specific line extending between those two points, allowing for more precise navigation and position plotting.

Bearing lines, on the other hand, relate to the angle at which an object is seen from the vessel, while course lines pertain to the intended path of the vessel. Reference lines generally denote any standardized lines used for navigation and do not specifically pertain to the alignment of two charted objects. Thus, the term that accurately describes the alignment of two charted objects is the range line.