I have finally been trying to use the features on the units i bought a couple of years ago. 1198c si and 999hd si The image below is typical of most of the pictures I get. I don't know if its interference, bad connections, settings? This image was taken with the settings at sens. 11 contrast 10 sharpness low 455hz chart speed 3 or 4. I have tried changing the settings sens and it does not appear to change anything. Is it possible that the 2d side of the unit being in max mode, 200hz, and sens. being 9 is effecting the imaging? Also the water is very dirty with visibility about 6 to 8 inches. mostly just mud from the creeks, leaves and trash not so much. Sorry for the long dissertation, just trying to get in all information i can Thanks