The marine radios are working again, they have been for about 10 days or so, I am told they have been tested as far as 75 miles from shore and worked with good clarity. There is still a little feedback issue, But I have a better understanding of what could be causing this, The unit needs to have its own power supply, as it is shared with other appliances now, I am working with JPS to see if we can get a direct feed to the unit itself. will keep you posted.