Thank you, zerg901! Much appreciated!https://firescope.caloes.ca.gov/ICS Documents/2021 MACS-441-1.pdf
URL for 2021 MACS 441
OST transmit tones are new for NIFC Tacs and R5 Tacs. I will guess this is useful for any aircraft over a fire who wants to listen to the Tacs without hearing traffic from 3 states over.