Add tab position indication to classic hydraulic systems. AutoTrim Pro (ATP) requires the presence of actuator sensor wires in order to display trim tab position indication LEDs (although all other ATP features will function without sensors) The current helm control you have will determine whether or not you have sensors. EIC5000 and TPI2000 have sensors, ES2000 and LS3000 do not. Application A1101A or A1200S actuators w/1" piston shaft showing