What is a line checkpoint?

A line checkpoint is defined as a natural or manmade linear feature on a route. These features serve as reference points for navigation and situational awareness during operations. Examples include roads, rivers, fences, or any extended, identifiable boundary that can guide a unit or individual through the terrain.

Utilizing linear features reduces the cognitive load on personnel as they navigate, providing clear guidance through the environment. This is particularly beneficial in complex terrains where other visual cues might be limited or altered. By aligning movement along these established features, forces can maintain direction and proximity, ensuring better coordination and reducing the risk of getting lost.

Other options do not fit the definition of a line checkpoint as they either pertain to predefined routes or specific coordinates, which do not provide the same tactical benefit of referring to a physical linear feature in the environment.