What is a maneuver control measure for the coordination of military operations?

A phase line is indeed a maneuver control measure used in military operations to facilitate coordination and control among units. It serves as a predetermined line on the ground that units use to synchronize their movements and actions. Phase lines help in establishing a common frame of reference for units maneuvering in the battlefield, providing a reference point that enhances the coordination of operations.

The use of phase lines allows commanders to communicate positions and movements effectively, as units can report their locations relative to the phase line. This can be crucial during complex operations where understanding the relative positions of units can affect decision-making and execution.

In contrast, while fire support areas, boundaries, and fire support stations each play important roles in military operations, they serve different functions. A fire support area is designated to control the delivery of fire support, boundaries help define the limits of command authority or operational areas, and fire support stations focus on providing or coordinating specific fire support assets. Therefore, in the context of maneuver control measures, the phase line uniquely serves the purpose of improving coordination among maneuvering forces.