Not sure on WHY it has 2 different MPH
but it's the lower one that is the true one. I had it on idle and was moving from 2.8 when I was going into the wind to about 3.7 going with the wind. I have everything set to factory defaults except I did turn the sharpen image ON and played with the colors on the screen. It has 2 Ambers and I like the amber2 the best, just can see more detail. I did play with the offset distance abit. If you'll notice that the one that you call a tree WB has 102 right and left were all the rest had 150. I figured that being the same screen width that it I only had it half the distance, the image would have a zoom look to it and everything would be bigger. First trip out so it was just a look around morning for us. Wife and I had fun and goofed off for awhile was all. Got on the water about 7:30 and were back off about 10 or 10:30. Now I got to figger out how to mark way points in the Side views. Say I see a school of baitfish 50 foot off to one wide, I want to mark it and go fish it. Gotta do some more reading I recon
proud member of "Team Cup"