So I found something I never knew about my Garmin fish finder, and thought I would share it with others. I have always used old school math to estimate how big my sonar cone was depending on the depth of water I was fishing. This is great info to know, so you have an idea how big of an area you are getting returns from around your boat. Turns out with the Striker series, if I turn the A-Scope will show the cone diameter in the lower right hand corner. I am sure some already knew this, but others may just sharing this cool feature.