So I installed it and the radio works great, however the internal GPS/clock when connected to the 'black box' wont work. I connected different Garmin HH to it to check conections and the Garmin talks to it but the RM Sea Ray Navigator II must be 'speaking' another data language. Any ideas how to get it to work? I have no idea what the GPS product is but sense that it is intergrated into the SR Navigator unit! Thanks