Nodus Secundus was a human-built communication system capable of sending broadcasts.

Aliens versus Predator 2: Primal Hunt

The Ancient Predator used a signal emitting F4V. booster imaging to send Prince his coordinates in Aliens versus Predator 2. Immediately after sending the broadcast, the Ancient was killed by a Predalien chestburster.

Aliens versus Predator 2

Andrew Harrison used Nodus Secundus to reset the primary transport route to V. 290 booster protocol right before being knocked unconscious by Dunya and her Pulse Rifle.