Exploration Ships have specialized sensors to predict stellar coordinates of distant stars.
These coordinates are required to target jump, and must lie within the gravity dwell zone of the targeted system.
Robotic gravity probes are sent to test the accuracy of predicted coordinates.
If correct, the probe exits jump within the star’s gravity dwell zone.
Gravity dwell lets the probe’s drives regenerate for a return jump.
If the coordinates are outside the dwell zone, the probe cannot regenerate drives and is lost.
Exploration ships can confidently plot coordinates up to 7 light years away.
To map a route to a primary target star 25 light years distance requires plotting coordinates to 3 stars along the way, called waypoints.
Waypoints are selected from stars with solar mass 0.8 to 1.2 Sol.
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