PayPal: View Cart PRODUCTS GPS replaces the PaddleWheel speed sensor. All of our products have a 1 year warranty! Airguide™  GPS Retrofit GPS for Medallion™ MDC/MMDC/Speedometers PerfectPass™  Accessories Approx Years: 2002 to present Approx Years: 1998 to 2003 Approx Years: 1983 to 1998 Shipping PerfectPass (tm) NL4 NL2 Airglide Boat Search