Recon:Radio Relay (mission)
Recon relay involves entering the AO to act as a middle man for another recon team. Your job here will be to locate a spot with a high chance to re-transmit successfully (This is done by moving you radio man around and selection the RTX nob near the top right of the radio). Once this is done just sit and tight and relay the signals until the other team extracts. A message will then appear telling you to extract and a bit of music will play, meaning the re-transmitting is complete.
Remaining undetected will unlock a kill card.