there were four push button selectable, crystal controlled frequencies in the VHF SCR 522.
USUALLY there was one set to escorted bomber wing frequency, one set to Group inter communications, one for Homing and one for Rescue.
on long range missions a Radio Relay was often flown by a couple of fighters within the group to transmit Fighter Command or Type 16/Beachy Head control directives - going to the group Command channel.