Hey guys, I was one of the very early (first month) users of the sideimaging with the 987c. I left it with my last boat I sold and the new one had Raymarine but I bought a 998c SI to put on it.
I just can't get the same picture quality. I know the 987c was a 1KW transducer and they added DI over time and such. I could see clear bottom out to 2000' of water.
The 998c I turned off all the sharpening and such and go the SI view good but the down imaging is a mess and color view is like made from legos.
OLD
This is the new one.. BEST I can get.. I'll go pull my SD card but it's just sometimes good, sometimes horrible. I try all sorts of frequency for side and down and my raymarine shows stuff the humminbird never sees. Used to be the other way.
of course about 600' is all I can get but I understand the lower power.