The RAA100 Maretron Rudder Angle Adapter is compatible with both the American standard (240-33 ohm) and the European standard (10-180 ohm) resistive senders. In fact, the RAA100 can be calibrated for any resistance between 0 and 300 ohms. You can also use the RAA100 with existing analogue gauges so you don't have to give up your existing analogue gauges to enjoy the advantages of digitally networked information.