As the title informs. these screenshots are a bit deeper than most bass-guys would go. But just in case you wonder how GT54HW performs in deep freshwater, here are a few screenshots. All taken with the ActiveCaptain-app on my Iphone, the unit ised is 8410xsv (called 8610xsv in the states). Depth in meters so multiply by three to get feet, temp in celcius (cold as he--).
Just in case someone wonders if GT54 can be used with Airmar TM185HW, the answer to that is no. In the first half here I run both transducers, and you can see the crosstalk i massive:
Just in case someone wonders how deep the GT54 can go, I have had good bottom reading as deep as I have used it, abot 320 meters. Here is a screenshot from 290 meters (870 feet):
Going to manual depth.