Another good option is buy a android double din head unit. Amazon sells them. Can rig up a backup camera. Install navionics and it will run your radio. So if you feel like upgrading your radio you can run navionics with downloaded maps for a couple hundred bucks. And stream music on your phone. And use the dashcam/backup cam to record video on an SD card while you fish. Sent from my Pixel XL using Tapatalk