How accurate is the Humminbird Onix Side Image units? Here is a photo of a recording I did with mine.
I had a chance to get out on Pickwick Lake yesterday and do a little fishing and side image recording with my Humminbird Onix 10 SI Cross Touch. While i was scanning in the back of Bear Creek I scanned these old railroad tracks. These tracks are part of the construction of the old canal system that starts t the mouth of First Creek on Wheeler Lake and runs all the way to Waterloo, Alabama. If you want to scan the tracks for yourself I posted the GPS coordinates on the photo.
You can see the train the used the tracks now located under Pickwick Lake.
U.S. Army Corps of Engineers Nashville District Historical Photo: This is a graveling crane and stone yard at Riverson, Ala., which is supporting the Colbert Shoals Canal project Nov. 8, 1895.
Here is a drawing of the canal lock that is submerged under Pickwick Lake that is across the river from Waterloo.
Construction of the Riverton canal, as you can see there was a lot of manual labor involved in the construction.
Setting the stones used in the construction of the lock. Most of the stones were cut from quarries up and down the Tennessee River. Keller quarry was one such place and you can still see some of the cut stones located there to this day.
Upriver entrance going into the entrance of the Riverton lock.
Down river gate exiting from the Riverton lock.
Humminbird Onix Side Image scan of the old Riverton Lock.
If you want to take a look at the lock with your Side and down Image units here is the GPS coordinates: N34.53.851 – W088.04.048 enjoy.
I like to record from my Side Image and Down Image units as I’m fishing. I usually try to spend the last 15 minutes or so of my day on the water recording what my units is scanning. If you don’t know how to do this there are a few older blogs on this site that will show you what you need and how to do it. Just do a search for RECORDING from the search bar on the right side of the screen.
As it was recording yesterday I found this old auto frame in Pickwick Lake. To me it looks like the frame might be the only thing left. Since it is upside down I can’t tell if it’s a truck or car frame. I’ll try to get a better image of it the next time I’m in the area. If you would like to take a look at it here are the GPS coordinates: N 34 46.333 – W087 42.199
Here are two more screen shoots that i did from a recording from my Humminbird Onix 10 SI Cross Touch unit. As you can see from the first screen shot there is a school of bait fish and to the right there is a small top or stump. Can you spot the top and the possible fish in that area?
Humminbird unit down image set to 455 kHz settings.
Down image set to 800 kHz setting.
Now let’s look at another screen shoot from the same area but this time I have the 800 kHz settings instead of the 455 kHz. Can you see the treetop and or stumps from the first screenshot? As you can see there is a huge difference when you are looking for structure and fish while scanning with your down image unit.
If you own a Humminbird unit and their Auto Chart Pro software then you will be able to see what you’re fishing as you are on the water from your waypoints. Not only will you be able to see the contour lines but also what is on the bottom of the lake ahead of you, behind you and to the right and the left of you as you’re on the water fishing. Mark a waypoint and pull up onto it and start making your cast thinking you hit might that stump, brush pile or rock pile? With the Auto Chart Pro software you will be able to know what it is that you are casting to. If you have your units hooked to a network the Overlays will show up on the other unit even if you don’t have a Zero Line card in that unit. I have mine in the console unit and it shows on my bow unit as I’m fishing my waypoints.
On a standard GPS screen you only see the contour lines and your waypoint icon. (The red lines are my track).
Now take a look at that same GPS screen with the Auto Chart Pro software with the Side Image Mosaic recording overlay. Make sure you have your Auto Chart Pro Zero Lines Card in the second SD card slot.
See the huge difference in knowing what you are casting to?
See the huge rock that you can clearly see? You can now see where the target is at know exactly where to make your cast.
Okay now that we have the converted maps and recording on your Auto Chart Zero Lines Card here are the settings you will need to make to get them on the screen. These Menu settings are on my Onix 10 SI Cross Touch. Select the GPS screen on the unit and select the Menu button on the unit to bring up the menu options for the GPS screen.
Scroll down to the bottom option and select Chart Options.
After selecting Chart Options now Select Map Data. As you can see I have Global turned OFF for these settings.
(Figure AC_9a) (Figure AC_4a)
The first thing we need to do is to select Satellite–Land from the Base Layer option menus screen. This let’s you see both the contour lines and the satellite image of the land around the lake. Press Exit once to go back to the prior screen.
Now from the Map Data menu screen select Map Overlay for the next options.
Make sure that Overlays is turned ON and I like mine set at 90%. Also select SI Mosaic option as well. Press the Exit button once to go back to the prior screen.
From the Map Data menu screen this time select Depth so you can make a few option selections there.
Make sure to select Depth Colors is ON I use 5 colors. Make sure Depth Highlight is ON, I set the mine to 1 foot. The last thing is to set your Highlight Range. I use 5 feet for mine. That’s it now exit ll the way out to the GPS map screen again.
Hope this help you more out of your Humminbird units.
Here is a Side Scan shot from my Humminbird Onix Touch SI 10″ of an old sunken boat I found.
Let’s take a look at this shot of an old sunken boat I found with my Humminbird Onix. I have the kHz setting set to 455kHz narrow beam on Down Image. Do you see the fish?
Here the the settings on the Down Image is set to 800 kHZ on narrow beam. See the fish?
As you can see the fish are very easy to spot with these settings.
If you own a Humminbird depth finder there are settings that allow you to change the kHz setting for your unit. So you may think does it really matter if I change these? I’m not going to get into the technical aspects of the inter workings of the setting I’m only going to show you three photos of why it matters when you are looking for fish. One thing is that these shots are from recordings taken with my Humminbird Onix 10 Touch SI and Humminbirds AutoChart Pro software. One thing to note is that the water depth under the boat is about 8 feet deep.
Here is a traditional shot of a tree and an old boat. The boat is to the extreme left and the tree is in the center of the shot. As you can see from the dark red colors this means it is a hard solid object. The setting is set to 200 kHz. From this shot you really can’t tell what the object is. If you can see at the very top of tall three shots this is very heavy current from water being released from the spillways at Pickwick Dam. They were actually spilling about 90,000 cfs. There are a few small fish that can be seen in this shot.
Here in the next shot I have the unit set to 455 kHz. With this setting the beam is set to wide and you can see farther out from what it straight under the boat. Again you can see the turbulence created from the current. Now you can see rocks and boulders laying on the bottom and a better view of the fish. The fish as you can tell are suspended and not on the bottom. There are a few very near the bottom and I think these are drum as I did catch a couple of them on a hair jig. The tree and the boat you can barely see them but you can make them out.
Now in the final shot I set the unit to 800 kHz for the down image settings. See how much clearer the old boat and the tree under the boat. Since the 800 kHz beam is much narrower you are able to see much more detail not only can you see the tree but the limbs on the tree. So all three settings have their place while you are fishing. To get the most out of your unit you have to play with the settings on your unit whether its an Onix or a core unit such as an old 597.
I hope this explains a little more about your unit and the settings and what it is capable of doing for you. I’ll post a few more shots as I find the time to get out on the water.
I recently had a chance to hit the lake for a day of crappie fishing. From reports from friends and others I had heard that the Dock Shooting bite was on for the crappie. A co-worker of mine Phil Lowry and I headed to the lake and launched my Ranger, powered on the Humminbird Onix and headed for the area of the lake we wanted to fish. I started on a point and turned my unit to side scan at 100′ out each side as I was wanting to convert the recording data into an AutoChart Pro map to be used in my Humminbird units. I had the chart speed set to 5 and was idling my boat at about 3.5 mph or so. Here is a link to a short video I did off the recording sorry for the shaking video as I was trying to hold my smartphone as I was viewing the recording. Side Scanning Docks for Crappie. Below is a photo of a screen shot from the recording. We shot this dock and caught about 20 crappie from this dock.
Below is a huge top placed in the lake by another crappie fisherman. We only caught about 6 crappie from this top.
Below is a photo of the largest crappie I caught that day, I’d say a little over two pounds.