The 2010 Triumph I purchased this year was previously owned by a gentleman who, after 2 months, decided to buy a larger model. The only electronic instrument he mounted on the boat was a Humminbird 788c combination fishfinder and GPS. When I added a VHF radio, I got a lot of electrical noise in the VHF whenever the Humminbird was turned on. I put the Humminbird on a separate battery and added a noise filter to the hot wire leading to the radio. Still got a lot of noise. I contacted Humminbird. They said I need to send the instrument back to them in Alabama for an internal fix that will eliminate the problem. Although the unit is less than a year old, the warranty will not cover this fix since I am not the original owner. It will cost me $188.95 plus shipping. My only suggestion is that if you install a Humminbird and have this problem, be sure you registered the warranty and have the receipt, or it will cost you big time.