I have used the Infinium for water hunting for several years. In the deeper water, I dig it all. In the shallow water I use the AT Pro or AT Gold with some disc. When I started using the Infinium, my gold ring totals went up considerably. Both the the Sea Hunter and Infinium are great machines, with a lot of good reviews from people who have learned them properly. The new Garrett ATX has a bit more depth and has a mode which grunts on iron like the AT Pro in the top 4-5 inches on coin sized objects, and deeper on larger items.