Icons of beacons
Tachyon Relay Beacons (TRB) are part of the Tachyon Communications System for faster than light travel in space.
TRBs are also used in Interstellar Positioning System Synchronization: In case a ship is in a star system with multiple TRBs, the TCS polls all of the beacons and computes the ship's position relative to the star and the IPS grid within a few meters.