The Slipbeacon is a method of supposedly faster-than-light interstellar communication via Slipstream Space used by the UNSC. Compact enough to be mounted on a starship, the Slipbeacon is known to be used in distress situations. Beside messages carried by starships in shipboard memory or Slipspace COM launchers, it is the one of the few methods of faster-than-light communication known to the UNSC, though its exact nature or function is unclear. A distress Slipbeacon to FLEETCOM was raised by Team Black shortly after their ship crash-landed on an unnamed Moon.