AFD usually uses a fire TAC, EMS 1 and 2, APD uses everything from zone 5/FIT and APD-TAC-1, TAC-2, some of the SOG talkgroups, it all depends on what they agree on at the start. Scan those and you'll find them.
Last year the event staff were using UHF MotoTRBO radios. Not sure who's system they were on, if any.
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