Slipbeacon

The Slipbeacon is a method of faster-than-light interstellar communication via Slipstream Space, known to be used by the UNSC in distress situations. Beside messages carried by starships and Slipspace COM Launchers, it is the one of the few methods of faster-than-light communication known to the UNSC.

A distress Slipbeacon to Fleet Command was raised by Team Black shortly after their ship crash-landed on an unnamed Moon.