This acoustical beacon, that once broadcast an unidentifiable signal repeating at intervals of twelve seconds, was part of a derelict ship that crash-landed on LV-426 prior to its discovery by the Weyland-Yutani Corporation.
Discovery by the Nostromo2122, an unidentified signal being broadcast from LV-426 was detected by the Weyland-Yutani Corporation and the crew of a commercial hauler, the USCSS Nostromo, were subsequently sent to investigate. They found the signal emanating from a derelict ship. The ship was believed to have crashed on this moon several millennia prior to the arrival of the Nostromo. The signal was later identified by Lte. Ellen Ripley as a warning signal rather than a distress signal. While exploring the derelict ship, Kane discovers a vast chamber containing numerous eggs, one of which releases a creature that attaches itself to his face. Dallas and Lambert carry the unconscious Kane back to the Nostromo, leaving the beacon itself undiscovered.
Discovery by the Anesidora
In 2137, 15 years after the Nostromo set down on LV-426, the Anesidora found the Nostromo's flight recorder, detected the same beacon, and subsequently landed on the moon to investigate and salvage anything of value. The crew discovered the derelict ship and equipment left behind by the Nostromo personnel. While exploring the derelict, Henry Marlow, the captain of the Anesidora, used a tracking device to locate the beacon and disable it, preventing any other salvage vessels from discovering the ship.
- Beacon is the name of the ninth mission of Alien: Isolation, where the objective is to explore the derelict ship on LV-426 as Henry Marlow in order to find and disable the beacon.
- In Alien: The Illustrated Story, Ash says the beacon is repeating at 32 second intervals, opposed to the 12 second intervals that Ash makes reference to in the film Alien.