Mike, i have a 587ciHD. I really dont like mine.At the end of the season i plan on sending it in under warranty.
Anchored solidly, the gps says i am moving .5-1.5 mph.
the depth jumps around so much, i cant tell how deep i am.Lowrance on the bow say 8ft, humminbird on the console says 11.0, them 13.8, then 12.5, then 13.5 etc
Bought it brand new in January and i am going to try and get a brand new one. If the new one does the same thing, you want to buy it