What assembly mounts in the place of fins to measure the movement of the control system when operating the TS-4044?

The Torque Measurement Assembly is the component that replaces the fins in the TS-4044 system to accurately measure the movement of the control system. Its primary function is to provide real-time data on the torque being applied, which is critical for assessing how the control surfaces respond during operation. This measurement allows for precise adjustments and calibration of the control systems, ensuring they function optimally.

The other choices do not align with the specific functionality needed in this scenario. The Angular Velocity Sensor focuses on measuring the rate of rotation but does not substitute the fins or measure torque directly. The Stabilization Unit is involved in maintaining stability but does not serve as a direct measurement substitute. Likewise, the Control Surface Tester is more about testing and verifying the functionality of control surfaces rather than replacing fins for measurement purposes.