Sitex SP-70 Inboard Pilot Rotary Reference No Drive

The SI-TEX SP-70 Inboard Pilot Rotary Reference No Drive is a compact autopilot system designed for recreational and professional boaters seeking reliable, hands-free helm control on vessels up to moderate displacement. After years on the water, you recognize that true autopilot performance means maintaining course in variable sea states while reducing fatigue during long passages—whether you're running a coastal day trip or crossing open water. The SP-70 delivers that essential capability with a straightforward interface that doesn't demand constant attention or recalibration.

This system employs a rotary rudder reference design that senses actual rudder feedback through a solid-state transducer, ensuring the autopilot knows exactly where your helm is positioned at all times. The ultra-compact, fully waterproof control unit features a large LCD display that continuously shows heading, course, rudder angle, operating mode, and any system alerts—critical information when you need to troubleshoot or verify performance in rough conditions. Simple keypad operation means no steep learning curve; you set your desired heading and let the pilot hold it, making course corrections automatically without hunting or overshooting—a sign of mature proportional control tuning that respects inboard vessel dynamics.

The rotary rudder reference design suits inboard installations where mechanical feedback from the steering system is reliable and accessible. This autopilot excels for cruising sailboats, trawlers, and fishing vessels where consistent course-holding in autopilot mode is more valuable than aggressive maneuvering; it pairs well with established wheel steering systems and integrates cleanly into engine rooms where the sensing hardware remains protected from spray and UV exposure. Weighing 20 lbs, the control unit mounts easily at the helm, and the modular architecture allows straightforward integration into existing marine electrical systems.