These communication devices can be found scattered across the galaxy. They are imperative in the process of interstellar communications. Few commercial craft are outfitted with the technology to send a message across light years of space, so these buoys were invented. They form a network that allows ships to contact each other from opposite sides of the galaxy by inputting their message into the buoy which relays it to the next one and so on.
Really that is an awesome job. It's rare that people think about this kind of thing, but seriously, in a theoretical space, these would be the nuts and bolts of all communication.
Be proud. this is a swell piece