Topic: 1198 on kayak, cant make sence of side scan?

[gros21]

well i installed the 1198 and i love it but i paddled past submerged trees, pile ons for small warfs but i could not see them on my screen.

B4 any one asks no i have no screen shots as i checked my sd card was a fake which fills the card up 100% then trys to read the data but i forgot 2 format it.

pics were clear and i did see 1 or 2 fully submerged trees but thats it. I could not see any fish at all on side or down scan how ever the normal 2d there was a few.

i guess all imaskng is pic or 2 of small 4" square pile ons in the water and other half submerged trees and so on. even when i went past a creek inlet i did not see it.

is there any way to make sure trandsucer is square?
 
here is1 pic i got

[Roddy]

Gros21, Your unit is set to scan 60feet out left and right, from looting at the photo it looks as if you are setting more than 60 feet from the fiver bank.

Try increasing SI Range.

That water intake pipe should stand out real nice!

Roddy

[gros21]

60ft = 20m i was generally 30ft from the bank either i drifted out a bit to take pics/retie a lure or i moved out to avoid a snag/tree/shallow area. several places i was 15ft and went right past half submerged structure and it wasnt as clear as i expected (cold not see any thing to tell me i was going past a tree.  might double check transducer angle next time but id still expect it to show up either a touch early or late depending on the angle.

i was also suprized with our recent floods the bottom didnt have alot more stuff on the bottom, however i did see some good/different bottoms and weed beds

Its freshwater with 1-3ft visability

[Drifter]

 gros21,

is there any way to make sure transducer is square?

In a paddle craft you will be rocking on a regular basis. That's why I use a small towfish from my canoe. Another advantage to the towfish is that it points into the direction the boat is drifting - no matter which way the boat is facing.
 
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If you are concentrating on seeing the shoreline, you can display just one side of the SI view to allow you to see more detail.

Darrell

[Jim Jack]

What chart speed were you using? The best images come when chart speed equals boat speed. 

[gros21]

Chart speed 2 or 3. Every thing was crisp can't complain there. It was just the fact I expected to see slot more. To be honest just looking at the screen I wouldn't of been able to tell u if I went past pile on or not.

Other than the odd tree I saw which I must of been directly under me as it protruded into the dark areas of the water. I really saw no structure on the si.

Ill take it out again next weekend and take it past the boat ramp and see if I can see the textures of the ramp which would go 30ft into the water

[Jim Jack]

Is the td mounted to one side or the other? What frequency were you using?

Something about the very outside edge of the picture is not what I'd expect to see. The bottom half of the picture looks to smooth like the signal is not reaching the shore.

[gros21]

you are right im not close enough to the sure i think i drifted away to tie a new lure on and decided to take a pic.

that pic prettymuch just shows how its installled.

i use a bung to ram mount this pic is not of my set up but its the same kayak, with the same set up

[gros21]

the 1 pic i se of my souder as far as i see is it wasa harder bottom just changing nto a harder bottom. side scan is nolt picking up banks.

also whats the green line at the top of my 2d pic it was there all day

might adjust transducer as mine goes stight down from ram mount

[Humminbird_Greg]

gros,
What Si frequency are you using?
I understand that the last picture you posted is not your kayak but you said that it has the same setup.  Does this mean that the transducer you are using is that same size (approximately 10cm long) or is it the larger HDSi transducer (approximately 15cm long)?

Not sure what green line you are referring too.  I see no green line in your second picture.

[gros21]

Not sure of my freq think it's 83/200 both.

No my transducer is the kinda iPhone sized one.

The green line is right at the top of the 2d sonar going through the "0" of 0 feet.

What freq do u reccomend I run my transducer at?

[Roddy]

gros21, SI/DI Freq is 455 or 900 for the Humminbird units reset to one or the other.

Iphone size maybe 180 HDSI Xducer.

The Green Line is surface reflection.

Recomend Freq 455 search and 900 for detail inspection.

Roddy

[gros21]

Ok I'll set it at 900 then as I'm going pretty slow 2-3miles.

Will have to remember to take screen shots next time. I might record it and play back on my pc.

I think I just need more time with it.


Yea it should be the stock transducer. I'd say iPhone 5 size but 1"+ thick with the temp probe at very rear of transducer.

[Humminbird_Greg]

Check the “Side View Frequency” menu setting for the Si frequency you are using gros.  If you have not changed it the default is 455kHz.  I would recommend using 455kHz due to its wider coverage area.  The 800kHz will give you better detail but it will not reach outwards and show things that are higher up and to the sides of the transducer that the 455kHz will.

That does sound like the correct transducer.

Gotcha on the green line.  Roddy is right; that is surface clutter.  You can adjust the Surface Clutter menu to get rid of it if you wish to.

[gros21]

Will check the settings next time I power it up. The green line is fine long as its norm.

I think it just needs more time on the water really.

Just finished cutting down iPad screen guards to fit my 1198c at $1 each from eBay I can't complain.

[ITGEEK]

I think the type of craft you are using is not
condusive to the best images.
Slow, steady, and in a straight line will produce the
best images.  A constant rocking right to left is going
to cause image distortion.  I think Drifter has the best
solution by using a towfish.

[gros21]

I'm using a pedal craft (hobie) the pics are crisp I just don't know what I'm looking at yet.

A tow fish means by the time I see the fish I'm even further from them.