Thread: Regular sonar or DI for brush piles

Originally Posted by rdjj71m

I agree 100% with Rickie, genec on the 2d, DI, as I have fished 1000's of BP. The only thing that's better is if you install a 360TM.

I have just started fishing brush piles. I find the bp's with side imaging, mark them and then troll to them using 2D. I know I'm staying on top of them because I can see the clutter of the bp and baitfish on the screen, and I catch fish. My question is how do I dial in my 2D settings to get a clear image sitting still. I get a decent picture moving but just clutter sitting on top of the brush.

justatrollin, It is impossible I believe without more data for anyone to help with your setup. Their are a lot of people on this forum that I'm confident can help if you will provide more information.
1. Unit type, model, and transducer
2. Are you using 200kHz, 200/83kHz, 83kHz for your 2D
3. If HB are you using "Clear" or "Switch Fire" mode

If possible a screen shot would be a great help. If you do not know how to save a SnapShot on an HB or LOW we can help with that.

I have attached one for an example:

Originally Posted by rdjj71m

justatrollin, It is impossible I believe without more data for anyone to help with your setup. Their are a lot of people on this forum that I'm confident can help if you will provide more information.
1. Unit type, model, and transducer
2. Are you using 200kHz, 200/83kHz, 83kHz for your 2D
3. If HB are you using "Clear" or "Switch Fire" mode

If possible a screen shot would be a great help. If you do not know how to save a SnapShot on an HB or LOW we can help with that.

I have attached one for an example:

I am using a HB 899 at the console and a 859 at the bow. I use switch fire clear mode. I get an image like you posted while moving I'm just asking if I can get that good of an image while sitting on top of the brush pile. I usually keep the chart speed on about 4 but I have run it down and up. Maybe I need to try jigging mode? Also I usually use 200 kHz on the transducer built into my xi5 while sitting over a bp. I turn the sonar off on my console unit as well.

Passing over a brush pile using 2d will display = no brushpile/then brushpile/then no brushpile again across the horizontal area of the display ...giving the mind's eye a visual of a solitary brush ...



This is simply because -(as the boat travels over and past the brushplile) = the brushpile is not in the cone/ then the brushpile is in the cone/then the brushpile is not in the cone again ...
-----
-----

Conversely, sitting stationary over a brushpile is keeping the brushpile in the cone continuously ... which paints the brushpile across the entire horizontal area of the display - giving the mind's eye a visual that the brushpile has no beginning --- nor any end ...



It definately tells you the brushpile is in cone ... it just doesn't look like the pretty solitary brushpile in the 1st image above ...

Rickie

BTW ... this image shows how removing the upper section of the water column (using the "Upper Range"" setting) effectively zooms and enlarges the structure on the display ...



Rickie

Nice write up Rickie, very nice explanation.

Originally Posted by rnvinc

Passing over a brush pile using 2d will display = no brushpile/then brushpile/then no brushpile again across the horizontal area of the display ...giving the mind's eye a visual of a solitary brush ...



This is simply because -(as the boat travels over and past the brushplile) = the brushpile is not in the cone/ then the brushpile is in the cone/then the brushpile is not in the cone again ...
-----
-----

Conversely, sitting stationary over a brushpile is keeping the brushpile in the cone continuously ... which paints the brushpile across the entire horizontal area of the display - giving the mind's eye a visual that the brushpile has no beginning --- nor any end ...



It definately tells you the brushpile is in cone ... it just doesn't look like the pretty solitary brushpile in the 1st image above ...

Rickie

Thanks Rickie that makes a lot of sense.

What a great thread with loads of good information.

I am a new user of a HB 798C SI/DI. I set it up as portable in an ammo box and a clamp-on ducer mount. Gives me the ability to use rented Jon boats at State waters.

I am so new at using this equipment that most of the time I don't know what I am seeing on the screen.

I fished Lake Tholocco in a rented Bass Tracker this past Saturday and kept the unit in SI/DI split to troll the channel in the lake. It was very helpful in that I was able to keep the boat mostly in the channel. I could see bigger structure but certainly missed some stuff.

My settings were (200/83), Clear mode, Blue palette, lower range set to 30' (deepest part of the lake), SI /DI sensitivity set near max, Fish alarm off, and I can't remember the other settings.

After reading this thread, I think I will start using Sonar more often