The LTR system used by the Naval Surface Warfare Center, Dahlgren Division has changed frequencies. All talkgroups still appear to use voice inversion.
Interestingly, a guard was observed at the main gate yesterday, and he appeared to have a UHF handheld radio, possibly manufactured by Harris. This radio would probably operate on the Joint National Capital Region system, but Dahlgren's site on the system continues to only broadcast traffic for other installations in the region, such as NSWC Indian Head and Patuxent Naval Air Station.
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