Will be taking my e trac to the Outer Banks in North Carolina In a few weeks--The Outer Banks has produced older finds from the numerous shipwrecks over the past 300 or more years. I plan on hunting the low tide area where the least amount of trash is and was wondering what, if any, the depth advantage is for the larger coils. To set the record straight---I will be receiving my NEW e trac in a few days-replacing my Whites 6000 D of 25+ years---want to be prepared for deeper targets. Concerns: 1. Weight 2. Battery drain for a larger coil 3. Will a shark eat me Thanks for your advice---------Boog