I have been trying to figure out how to hookup my Furuno chartplotter to my VHF radio so I could use the DSC function. I looked online for a while with no success. Finally I just submitted an email to furuno asking them how to do it. They had a message on their site saying I would get a reply via email in 1-2 business days. Not more than 5 minutes later I got a call from Furuno telling me how to hook it up.:clap:clap I couldn't believe it. So if you ever have any questions about your Furuno equipment go to their website and submit your question and you will get a prompt response.