code/game/machinery/announcement_system.dm 
| /proc/get_announcement_system | Returns a random announcement system that is operational, has the specified config entry, signal can reach source and radio supports any channel in list. Config entry, source and channels are optional. |
|---|---|
| /proc/aas_config_announce | Announces the provided message with the provided variables and config entry type. Channels, announcement_line, command_span and source are optional. |