department of justice

While the RR Database lists "DC I-O 1" and "DC I-O 2" (the only one I've heard activity on is DC I-O 1, 159.150 MHz), I've read on the Monitoring Times blog about three other "DC Interop" frequencies as part of that system. These are “DC I-O 2 N” 173.7500 MHz “DC I-O 2 S” 168.0875 MHz “DC I-O...