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An old Eagle sonar that didn't do much except show depth.
My first fishfinder? My wife. (Image removed from quote.)She does a pretty good job too! I've since gotten the entry level Vexilar.
I bought an FL8 and a camera.....didn't know how to use the sonar so took it back. Went and watched u tube to figure stuff out. Then bought an FL20, then a vpg upgraded it to the showdown.(/Sold later) Then a FLx28, then and FL22HD, then a FL18.Today I have a FL18, FL20, FL22HD, and an FLx28 double vision. That way if anyone goes with me in the shack I've got them covered.
I'm going to be to looking for that red castle on the IGL!
My dad had this old Humminbird that came in this big yellow box (dont know the model) we pretty much used it just to check depths, if we used it at all.
Early 80's Si-Tex.
That is what I first used a Humminbird "Super Sixty" flasher in a "Bird Trap" portable case.