Kosmo you are correct about the rf interference, it can be seen in the 2d as well as the di. The 2d is using the us2 on the new Fortrex. The new tm is worse than the Maxxum I took of. I had a hb 747c that was unusable with the us2, with the skimmer it worked great. I agree both HB and Lowrance have some great products.