Today I discovered a new Unregistered Comms Beacon in HIP 8396, above planet 2. I was unfortunately unable to capture an audio recording, but on the hour it broadcast these digits four times:
which translates to
At Stepping Stone Base in that system I found another message in the HIP 8396 Herald dated 25 Oct 3302:
which translates to
Using the first clue as the cipher key for the second yields
In the V 773 Cassiopeiae system there is a "Distress Call" signal above planet AB 1 in which I found the Farragut battlecruiser FNV Formidable under attack by several ships (I noted a Cobra and an Eagle). My ship was not equipped for combat so I had to flee, but perhaps other pilots may wish to render aid until the Formidable's reinforcements arrive.
I noticed also that a similar signal had previously been discovered in nearby Takurua, so I searched the other systems along that vector (Sothis, Ceos, Robigo, Almagest, and Te Kaha) but found no sign of any other Unregistered Comms Beacons or Compromised Carrier Signal.