to the people that asked for the comparison.

it was a bit hard to get both sounders in the 1 pic, this was about the best pic for the day.

you can see the more detail of the hds.

both are running on 600trannys, the hds on a through hull and the navman on the transom mount.

i also lose reading on the navman at 14+knts, the hds will read to flat out with no lose of image.

this lump produced 2 pinkys today and nothing showing on the pic.

cheers ron