So, I was talking with the electronics guy for our boats and the subject of Doppler Radars came up. He is going to sea trial one this weekend. Very interesting tech, it is able to sense if the target is increasing range or decreasing range by the doppler shift in the return echo. It shades the closing range targets red, the increasing range targets green and stationary targets are blue. Amazing stuff and I can't wait to talk to him again about how it went. I believe it was a Furuno unit he was installing. Anyone else have experience with them?