Since the Air units and the K9s work citywide, back in the 1970s they decided to establish a specific frequency for them to always monitor rather than twirling around the dial as they went over or through different divisions, and Communications wouldn't have to go hunting for them when they were needed. They also began multicasting all urgent/emergency "hotshot" calls there too.What does "air K9" mean? Is it a flying dog with a helmet and XTS 5000 flying overhead. Just kidding. Seriously I am not sure what this unit is. Any clarification would be appreciated.
That should be 484.7125 as "rlg913" already mentioned. The downlink side of Air/K9 is also multicast on 484.350 for the Valley and 484.400 for the south part of the city.When the Astro Saber III radios came along in the late 90s, they dedicated the 506.7125 freq for it and named it the "Hotshots and Air / K-9 Hailing Channel," which became simply "Air/K9."