I see more air/water turbulence than blockage. I don't see any dark areas. You prob paying the price for owning a deep v. If you slow down does it it get narrower?
Lower the xducer more in the water if you can. Your image doesn't look much worse than 2/3 of the ones posting on the SI Yahooers. Go take a look.
Also, if you sit idle with SI on, does the stuff parallel to the boat trail go away? Try these two "SWAGS" next time out.
Hard to compare your images. You are going slow in the deep water and faster in the shallow water.
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