Thread: si quasi complaint

If you are in a soft bottom area that will help a lot,may even have to look for shadows on hard bottom,and not have too wide of a view,some of the pro,s will tune in and give good advice,I am just learning.

soft bottom here I think.

When in that deep of water, it's sometimes necessary to increase the SI range in order to show any bottom at all...(because the water column is taking up so much of the screen real estate)...

This, in itself, creates problems marking fish echoes ...because increasing SI range makes all echoes smaller on the screen...

You might try setting the SI to 1 side only ...which takes the echoes from the side chosen and "stretches" them out across more pixels...(basically zooming the chosen side)...

There is definitely nothing wrong with using DI in deeper water as long as the targets you are looking for reside in the area of coverage for the beam shape chosen....

Rickie

good ideas.
remind me what the coverage is for di using 455khz in say 40 ft.
thanks

DSI @ -10db
455 kHz: approximately 70⁰ (side-to-side)
800 kHz: approximately 50⁰ (side-to-side)



Rickie

this is total coverage? figures are both sides combined? thanks

This weekend, I was fishing 43 feet of water, it was some standing timber, on SI the Crappie jumped out just fine. I could tell exactly which trees to go to, and how deep to fish? I had a range of 90 set, 3mph, 455 was the si setting, 1198. I realize this wasn't a school of crappie in open water, and maybe that is what you are referring to? Usually I can tell if they are keeper size or not on my FF. I think on mine they show up at a big enough size that even if the tree wasn't there I can see them.

Originally Posted by brettw

this is total coverage? figures are both sides combined? thanks

Unless I'm mistaken, the chart is for downlookiing sonar only. There are no figures for side coverage. Aren't most of the side imaging units maxed at around 180'(per side)?