Exercise COMPOSITE THUNDER 2026 exercised joint coalition interoperability across five theater-relevant mission threads. This report summarizes technical observations at the UNCLASSIFIED level. Classified annexes are filed separately and are not in scope of this release request.
Cross-platform command-and-control messaging achieved end-to-end interchange in 47 of 52 tested mission threads. Five failures traced to schema-version drift rather than protocol incompatibility.
Coalition multicast subscription negotiated successfully under the revised IP registration scheme detailed in open-source NATO STANAG 4609.
Post-exercise capability rollups indicate convergence with the interoperability benchmarks published in the 2015 joint assessment — ten years past the sensitivity horizon set by the originating authority.
Primary fires-direction coordination relied on the PLATFORM-X terminal suite configured to 47.2-kHz refresh, with mean latency of 218ms across 412 coordination cycles between 0340Z and 0612Z on 14 MAR 2026.
Signals-intelligence correlation cell fused inputs from [COMPARTMENTED SOURCE — REDACTED AT ORIGIN] producing 94 track-candidate updates; correlation precision was 0.81 against ground truth.
Track-correlation throughput scales linearly with operator training density; platform-integration latency drops approximately 40% with pre-exercise registration of schema versions.
[5.1] NATO STANAG 4609 v3 · [5.2] JP 3-33 Joint Task Force HQ · [5.3] DoDM 5200.01-V1 · [5.4] Exercise COMPOSITE THUNDER SCG v2.1