Radio transmission from the supposedly haunted Green Mountain. The recording is on a loop and plays every several minutes to players who have a radio. The recording appears to be related to the outbreak of the virus which lead to the current state of Chernarus. The numbers heard are grid references, some of which are the location of deer stands.
The Morse code translates to:
We are no longer alive STOP This message will play every hour if operators are no longer responsive STOPMESSAGE Unable to quarantine