Yeah, i read a lot across the internet about the shooting through the hull with DSI. The amount of signal loss is negligible for me. Is definitely isn't crystal clear like in the water but i can still tell the type of bottom, depth, and make out the type of cover it is. There are downright flame wars out there about its use. It works for what i need it to doWish I knew this before getting my elite-4. Saw a lot of folks saying DSI wouldn't be worth it for a thru-hull mount but I guess the described amount of signal lost was exaggerated.