It is a looped emergency message, explaining emergency protocols One Seven Echo Charlie Niner, in which the South Boston Military Checkpoint is now being used as a shelter for emergency situations, as well as being chock-full of necessities, before warning that non-military personnel would be denied entry for national security reasons.
This radio station centers on South Boston military checkpoint. It seems that there is no accessible radio station or terminal in-game controlling this broadcast.
If traveling with certain companions when the site is approached, they may express a desire to disable the broadcast.
- Hancock will comment "There has to be a way to turn that off."
- Cait will comment "We need to find the transmitter and turn that goddamn thing off."
- Piper Wright will comment "Yes, yes! We hear you."
- Codsworth will comment "I wonder how long that recording has been playing, its quite intolerable."
Emergency frequency RJ1138 appears only in Fallout 4.