Was on the console when I heard;
"Mayday, Mayday, Mayday, we've hit another aircraft and we're going into the sea.........."
Happened in G airspace off the coast of Brisbane in the 80s. I then had to communicate with the search aircraft and relay descriptions of what wreckage and bodies were found.
Will never forget the utter uselessness of just having a radio, imagine how the ATCs in USA felt when 9/11 situation developed.