Garmin Electronic Control Unit (ECU) for GHP Compact Reactor [010-11053-01]Electronic Control Unit (ECU) for GHP Compact Reactor One of the 5 main components of your GHP Compact Reactor autopilot system, the ECU connects and powers the course computer unit (CCU) and the hydraulic pump, controlling the pump based on information received from the CCU. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to