Tactical Radios Cannot Share Waveforms Across Service Branches

The U.S. Army, Navy, Air Force, and Marine Corps each operate tactical radio systems built on incompatible waveform standards. An Army squad using AN/PRC-163 radios cannot natively communicate with a Marine fire team on AN/PRC-158 without going through a gateway or relay, even when they are standing 50 meters apart in the same battlespace. Joint operations require dedicated liaison officers whose sole job is to bridge these communication gaps manually. This matters because in a firefight, seconds determine survival. When a ground unit needs close air support from a different branch, the request must traverse multiple radio nets, get retransmitted through gateway devices, and often requires voice relay by a human operator. The Government Accountability Office found that during joint exercises, cross-service communication delays averaged 3-7 minutes for routine coordination messages. In combat, a 3-minute delay in calling for fire support or medevac can mean casualties bleed out or friendly positions get overrun. The deeper pain is that this kills the entire concept of Joint All-Domain Command and Control (JADC2), the Pentagon's flagship strategy for fighting near-peer adversaries. If a soldier cannot talk to a sailor without a $200,000 gateway box and a specialist to operate it, then the vision of seamless multi-domain operations is fiction. Commanders end up falling back to deconflicting by time and space rather than truly integrating forces, which surrenders the speed advantage that JADC2 is supposed to deliver. This persists because each service branch controls its own acquisition budget and has decades of institutional investment in proprietary waveform families. The Army's SINCGARS heritage, the Navy's LINK-16 ecosystem, and the Air Force's HAVE QUICK series each have massive installed bases and training pipelines. No service wants to abandon its waveform investment, and the Joint Tactical Networking Center lacks the authority to force convergence. Defense contractors also profit from selling branch-specific radios and then selling gateway products to bridge them. The structural root cause is that the DoD acquisition system funds communications programs by service rather than by joint capability. Until procurement authority for tactical radios is centralized or a true software-defined radio standard is mandated and enforced with teeth, each branch will continue optimizing for its own needs and interoperability will remain an afterthought bolted on with expensive middleware.