But Mira ran a diagnostic. The actuator wasn’t drifting randomly—it was creeping . Every 17 seconds, it moved 0.3 microns. By itself, that was harmless. Over an hour, though, it would introduce a wobble. Over twelve hours, that wobble would translate into a 2‑degree tilt in the drill head.
“No,” Mira said, pulling up the actuator’s thermal log. “Look. The hydraulic fluid temperature dropped 0.7°C in the last hour because a pump on the other side of the ship failed. The viscosity change created a false zero. The hardware is fine. The reference point was wrong.”
The next morning, a storm hit. The Northern Star rolled heavily, but the drill held steady. Actuator #3 performed perfectly.
But Mira ran a diagnostic. The actuator wasn’t drifting randomly—it was creeping . Every 17 seconds, it moved 0.3 microns. By itself, that was harmless. Over an hour, though, it would introduce a wobble. Over twelve hours, that wobble would translate into a 2‑degree tilt in the drill head.
“No,” Mira said, pulling up the actuator’s thermal log. “Look. The hydraulic fluid temperature dropped 0.7°C in the last hour because a pump on the other side of the ship failed. The viscosity change created a false zero. The hardware is fine. The reference point was wrong.”
The next morning, a storm hit. The Northern Star rolled heavily, but the drill held steady. Actuator #3 performed perfectly.
