I have reported several sources indicating that they have heard some P-25 digital modes in to 30 - 88 MHz VHF low band that were assumed to be military. Some were with confirmed P-25 Network Access Codes (NAC), but I have recently heard a report of actual military activity using P25 digital.
From somewhere in Wisconsin:
40.4000 MHz, P25 NAC F7E - Military aircraft (helicopters) in the clear, base side encrypted
Some have asked how this can be, as none of the major equipment manufacturers make VHF low-band P-25 radios, at least not for civilian use.
The major players in the military communications market (Harris, Thales, Motorola) all offer wide band, multi-mode radios that can be used in nearly any mode on any frequency. P-25 is an optional mode for these radios.
It's still not known for sure if this is an intentional move to use P25 in the VHF low band, or just accidental programming of a particular channel.
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