Lectrotab Automatic Leveling Control - Single Actuator [ALC-1]Automatic Leveling Control Single Actuator As wind shifts, water conditions change or passengers move about, the Automatic Leveling Control (ALC) will automatically adjust your trim tabs to maintain a level boat for a more comfortable and enjoyable ride. The ALC automatically corrects the roll from side to side and pitch from fore to aft to enhance your boating experience and improve your fuel economy. Features: Microprocessor based automatic leveling