This field manual (FM) serves as a reference document for tactical radio systems. (It does not replace FMs governing combat net radios, unit tactical deployment, or technical manuals [TMs] on equipment use.) It also provides doctrinal procedures and guidance for using tactical radios on the modern battlefield. This FM targets operators, supervisors, and planners, providing a common reference for tactical radios. It provides a basic guidance and gives the system planner the necessary steps for network planning, interoperability considerations, and equipment capabilities. Illustrated throughout.