Search and recovery in silt?

[popolarbear]

drop an anchor tied to a cave reel and do circular pattern. let out afew feet at a time and just keep swimming in circles for ever till you find it. or alternatively drop anchor, swim out to max 100ft or so and do one circle and see what the line snaggs up on.if the silt is deep you are never going to find it. i spent a month on one circle digging in the mud for a large pile of stuff when a boat tipped over for a pal, and found nothing. but again, what kind of gps coordinates you got. the kind that the boat was anchored or drifting and you hit waypoint. or the kind that the owner says i think it was on this side of the lake in front of this beach. its got to be here, then the second person in boat says no it was about 1/4 mile down the shore closer to this and this spot, then the third person says no i for sure got gps mark and that is another 1/4 mile farther down?.. for comparison, i have lost a weight pocket off the side of an anchored boat, and dug for 2omin before i got ran out of time and just went diving instead. also lost a weight pocket off a dock in DEEP mud and just cut my loss and bought a new one... not that i dont mind and enjoy a challenge to dig it out.