Does anyone have screen shots using down imaging sonar to show what bream/shellcracker beds would look like. I have seen them using side imaging; but was wondering if they could be found using downimaging.
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Does anyone have screen shots using down imaging sonar to show what bream/shellcracker beds would look like. I have seen them using side imaging; but was wondering if they could be found using downimaging.
This is a poor mans down image. I wuz looking down when I tools the pic.
http://i188.photobucket.com/albums/z...1202Medium.jpg
most would be too shallow
just P and the lake will rise
Being as down image units are looking "~ straight down", it's highly unlikely they would show beds. That's not really what they're designed to do. Their main function is to show a picture-like image of the cover coming off the bottom, more so than the bottom itself. Now, it "could be" possible to get such an image from DI ... if the beds were on a fast sloping bank bottom, since the signal would be at a sharper angle. SI has a wider angle signal field, and would give a better "bottom" image .... as the screenshot from Cache22 shows.Quote:
Originally Posted by polarcrafter
... cp :kewl
Thanks for the reply and information, this brings another question to mind. If a degree cone that gives a 20 ft. coverage at 20 ft. depth using either 2D or DI equipment shows an object, can it be determined where the object is in the coverage; ie, 10 ft.left, 5 ft. left, center, 10 ft. right, etc????Quote:
Originally Posted by CrappiePappy
Not really.Quote:
Originally Posted by polarcrafter
... cp :kewl
SI is your best bet
As the 2d is cone shaped...any echo target that appears at the right edge of the display can only be descerned as ..."x" ft away from the xducer-somewhere in that cone shape...(and the deeper the water - the bigger that somewhere is)...Quote:
Originally Posted by polarcrafter
As the DI is fan shaped...any echo target that apppears at the right edge of the display can not only be descerned as ..."x" ft away from the xducer...but also ...that echo target cannot be forward or behind the xducer...because the target must be in that fan shape that is 90° to the forward path of the xducer...
In a nutshell...when an echo target appears on the DI view...that target is either "directly under the xducer"
...or left or right of (and in line 90° with) the xducer a few feet...
Rickie
Attachment 152470
You can see them on the left.
Wow! Nice shot!
There is a way to tell which side the structure is on with 2d and that is to tilt the ducer a little toward front and turn your tm in different direction while watching the direction and looking at depth finder as object leaves and comes back into pic,i did that for years when i use to winter bass fish to follow shads,now i just a few days ago fix my transducer where it will tilt with other foot while turning tm to see where brush piles was at,it is a 798, but ofcoarse si will tell by turning tm but not as good as 2d