For you guys with the lowrance depth finders their web-site even has product emulators. You can adjust and tweek them just like the one on your boat. The site also gives tips on how to set-up for fishing your paricular depth/speed. Something good to try on a cold day like today and all from the comfort of your favorite computer chair. Their tutorial will walk you through a lot of features that you could put to use on the water. Very informative web-site. Good luck to all.