I do only beach hunting, and knee deep water, i notice that when i go into the water my coil floats at first then gets heavier. Come to find out, that the coil cover has a air pocket or gap around the inside edge between the coil and cover. So when i do get out of the water i have to drain the water out because you can fell the weight difference. Problem is, it also holds sand not the light sand, but the dark heavy sand,(black sand) because the light sand washes out in the water, but the black sand stays, similar to a using a gold pan. My question is, does anyone else use the coil without the cover, or has anyone who hunts beaches have the same problem? and i would think that the black sand in the cover would cause a little G.E.B problem?