What is the purpose of end-of-stroke switches in ALRE?

• A. To monitor hydraulic fluid temperature
• B. To detect stroke completion and safely terminate or transition the control sequence
• C. To control lubrication intervals
• D. To calibrate torque tools

Answer: (B)

End-of-stroke switches give a signal when an actuator has reached its travel limit, so the control system can safely stop movement or move to the next step in the sequence. In ALRE, this means the hydraulic or mechanical system knows that the stroke is complete, preventing over-travel, locking the component if needed, and transitioning smoothly to the next phase of the launch or recovery operation. They provide a reliable, automatic way to safeguard the sequence and equipment.

Other functions like monitoring hydraulic fluid temperature, lubricating intervals, or calibrating torque tools are handled by different subsystems or procedures, not by end-of-stroke switches.