MASSIVE cats!  Congrats slayers! 

Awesome info guys.  Thanks.  I def did not see anything like that.  That Garmin looks nice.
Mark, what brand did you switch to if you don't mind me asking?

For ocean use I switched to the Raymarine Element 9.
 https://www.raymarine.com/en-us/our-products/fishfinders-sonar-modules/element/element-hv?    I wanted the 7 but the 9 was on sale for substantially less than the 7. I was drawn to the Raymarine because of the fast processor speed, and the Hypervision 1.2 megahertz sonar. One item that I didn't think about but turned out to be the best feature is the ability to use the Navionics Platinum plus card. The shaded relief is a real game changer for rock fishing. Customer service is really good with tech support actually answering calls, and being able to resolve issues I was having.

The drawbacks are the large transducer that creates a fair amount of drag. My hook transducer is permanently glued in hull. Another issue is that there are not many of them sold so there isn't much information about them available on Youtube, or any other social media sites.

I think the higher end Garmin, and Lowrance units have comparable features.       

Personally I get a lot more sensitivity on my Lynx than on my Outback with the same FF (Lowrance Hook 5) but different transducers. I don't know if the difference is the transducer or the mount.
I remember taking notes from someone (Alan Fong?) that the transducer is more important than the FF and the ones that come included are not that good.

OK. I think I inserted the correct file.

I had the same issue a while back, and I think the screen goes blank over a certain depth. I was told by Lowrance tech support that I needed to set the depth range that I would be fishing at. I explained that we don’t fish on the west coast at a specific depth the bottom depth is constantly changing. For me the work around was to buy a different FF for ocean use. I still use the Hook in the lakes, and bays.