The ACU-150 (Actuator Control Unit) is a key component for Evolution autopilots used on vessels with hydraulic steering. The ACU-150 houses the main power and drive electronics for direct connection to the vessel's steering system and 12-volt DC power source. Pair the ACU-150 with a 12-volt Type 1 hydraulic drive. The ACU-150 and Type 1 hydraulic pump combination is designed for hydraulic steering systems with a steering cylinder capacity of 80 cc (4.9 cu in) to 230 cc (14.0 cu in). Combine with an EV-1 sensor, an autopilot control unit, and a Type 1 hydraulic pump for a complete autopilot system.