SI-TEX SP-120 System w/Rudder Feedback & Type "S" Mechanical Dash Drive

The SI-TEX SP-120 System with Rudder Feedback and Type "S" Mechanical Dash Drive is a professional-grade marine autopilot control system designed for vessels requiring reliable, hands-off steering in extended offshore operations. This integrated autopilot comprises the SP-120 display and control head, a 9-axis rate compass, and a rudder feedback unit—components engineered to maintain precise course control in variable sea conditions while reducing operator fatigue during long transits.

The Type "S" mechanical dash drive connects the autopilot control system to the vessel's rudder actuator, translating digital heading commands into mechanical steering input. The rudder feedback unit provides real-time positional confirmation, allowing the system to continuously monitor and correct steering performance. The 9-axis rate compass delivers heading data with sufficient sensitivity to detect and compensate for drift caused by wind, current, and sea state. Weighing 12.9 lbs and dimensioned at 7 x 6 x 15 inches, the control head fits standard marine instrument panel mounting while the mechanical drive system integrates with existing hydraulic or electromechanical rudder systems common on commercial and serious recreational vessels.

This system is specified for professional fishing vessels, commercial workboats, and offshore cruising sailboats where autopilot reliability directly impacts fuel efficiency, crew safety, and operational continuity. The mechanical drive architecture provides durability in harsh marine environments where electrical-only systems may fail. Installation requires integration with your vessel's existing steering actuator system—professional marine installation is recommended to ensure proper calibration and safety certification.

SI-TEX marine navigation systems have established a reputation for robust performance in commercial and offshore applications. The SP-120 autopilot represents the mid-range offering in SI-TEX's autopilot lineup, balancing advanced heading control with mechanical simplicity suitable for vessels where electronic complexity must be minimized.