concerning Down Image units....

I would like to see a real image of structure while moving..

Then I would like to see an image of the same structure while sitting still over the structure.

Then an image of this same structure with 2D while sitting still

I am trying to see what the difference will be, image wise, comparing the DI with 2D.

Most of my fishing is dock shooting or sitting still over structure...If the DI doesn't show more than the 2D while sitting still then I will save my money..

Thanks for any input