What is a specific boundary established to prohibit fires or their effects from crossing between friendly forces?

The concept of a Restrictive Fire Line (RFL) is crucial in managing the safety of friendly forces during military operations. An RFL is specifically established to prohibit fires, such as artillery or air strikes, from crossing into areas occupied by friendly troops. This boundary ensures that any fire support coordinated by a unit does not inadvertently harm its own personnel or assets, maintaining a clear separation that enhances operational safety.

In contrast, a Coordinated Fire Line (CFL) is used to indicate a line that may be crossed by fires, where coordination is required to ensure safety but is not as strictly prohibitive as an RFL. A Phase Line serves as a reference line on the battlefield for tactical movement, and it does not specifically address the prohibition of fire. Lastly, a Boundary generally refers to the separation between different units or formations but does not enforce restrictions on fire.

Understanding these nuances in terms is essential for effective fire support coordination and ensuring operational effectiveness while safeguarding friendly forces.