ACU-150 Actuator Control UnitThe Raymarine ACU-150 is a component of the Evolution(TM) Autopilot system and is designed to provide power and control to a Raymarine Type-1 Hydraulic Drive Unit (M81120.)The ACU-150 connects to the SeaTalkng network for communication with its other peripherals. It also has connections for an optional Rudder Reference Unit (sold separately.) The ACU-150 works on 12-volt DC systems only.To make a complete ACU-150 autopilot system you must also add the Type-1 Hydraulic Drive Unit (M81120), Evolution EV1 Sensor Core (E70096), Evolution Cable Kit (R70160) and either the p70s (E70328) or p70Rs (E70329) autopilot control head.