On 2D sonar why can't I receive big arches when looking at big fish? When I kick it out of gear and drift they show up as big arches but when I am idling around they just look like round blobs.
Printable View
On 2D sonar why can't I receive big arches when looking at big fish? When I kick it out of gear and drift they show up as big arches but when I am idling around they just look like round blobs.
Fish arches in the 2d image are created by the target (fish) being farther away from the xducer entering and leaving the Sonar cone as compared to the target (fish) being closer to the xducer in the center of the cone ...
Narrower Sonar cones do not have as extreme differences in distance in the edges of the Sonar cone vs in the center of the Sonar cone ...
https://youtu.be/ZIhRbqLALXs
Rickie
So as per your illustration I should be seeing some fish arches. Especially on a school of fish. We both know that they are not all pointed or swimming in the same direction so some of them should cross my cone angle correctly to create arches. My boat idles at about 3.3 MPH,no arches,when I kick it in neutral and it slows down to drift speed I get arches. I don't even get partial arches due to a unlevel transducer. All I get is round blobs. Something is wrong,I have been running Lowrance products for over 15 years. I'm running Gen3 units now with the latest updates installed.
Is your 2d frequency set on the wider cone setting (83kHz or Wide CHIRP) ...??
Rickie
I have pretty much tried all of my 2d transducer settings.
I installed a new 83/200 skimmer yesterday but have not tried it. I really don't think that's the problem,but I don't know.
Do you have any screen shots of yours?
I don't have any pix of 2d arches of my own ...
Spider rigging at 0.4mph is not very conducive to creating arches ...
I do need to add that to my list of pix to get for demonstration ...
Rickie
So this is mine sitting on top of a school of spotted bass I never see really good arches but I don't troll alot either.Attachment 333095
Sent from my Pixel 3 XL using Crappie.com Fishing mobile app
That's what mine looks like when drifting but at idle speed all that turns to round blobs.
boat speed. too fast=blobs or dots and too slow= more like thick lines
So is there a fix to this. I'm using it at idle speed.Quote:
Originally Posted by acwd1950
yes you can go into the menu and set scan speed to match boat speed, about 3mph should work good.
Where might I find this setting?
Sonar page, Advanced, Scroll speed.
I don't think he meant scroll speed is the same as gain speed. That's why I wanted him to clarify this. You can't set your scroll to a specified MPH,as far as I know.
my bad, I've forgot where to find it, but I do believe it's under sonar settings and I should've said PING speed. The signals from the 'ducer can be turned up or down. For better info on this contact Rickie, rvinc on here he's the 'bird guru.
Scroll speed same as chart speed and boat speed all play apart in making a nice arch.
Chart Speed
The scrolling or chart speed can also affect the type of arch displayed on the screen. The faster the chart speed, the more pixels are turned on as the fish passes through the cone. This will help display a better fish arch. (However, the chart speed can be turned up too high. This stretches the arch out. Experiment with the chart speed until you find the setting that works best for you.)
Sometimes I get a full arch, bust most times is 1/2 arch or just a ball. I know it is somethin down there if you are moving. I also know if there is a straight line when moving, it is either a fish swimming along with the boat or it is my jig. To be sure, I just raise my jig. If the image moves, it my jig and if it dont move, I have a hitch hiker.
The the thicker the arch, of half arch or "ball", the bigger the fish. Also, the very top of the arch, or half arch or ball, is the actual depth of the fish. If your jig is set near the bottom of the image, you will be below the fish.