In the morning I am going to hunt with my 705 a very well known beach that I have hunted with my sand shark. The sand shark finds every bit of useless wire, bottle caps, pull tabs and can slaw up to 10 inches and is too much for this old man to dig. So, I plan on putting the water proof 7.5kHz coil on my 705 and try some discrimination in ankle deep salt water. Now I could spend half a day playing with he settings or ask you all where to start . So please feel free to enlighten me as up to now I haven't gone anywhere near the wet sand much less in the water because my favorite coil is not waterproof and even damp sand causes falsing unless I turn the sensitivity down way below where I am used to hunting with the stock dd coil. Looking forward to your advice.