Ever wonder how long it would take to detect an entire acre?
Well, we did the math (sort of), and the results are both encouraging and depressing...
see below...
Area of an 8 inch Coil 50.24 square inches
Area of an Acre of Ground 6,272,640 square inches (522,720 square feet)
Given 1 sweep covers 6 liner feet, or about 576 square inches
That means that there are at least 10,890 sweeps of the coil in an acre, and that is with no overlap!
Say you sweep at a rate of 1 1/2 seconds per swing. At that rate it will take you 16,335 seconds, or 272.25 minutes, or 4.53 hours to cover an acre. Again with no overlap, and not stopping to dig anything!
If we add dig time for 400 targets (boy, is that ever a conservative estimate) at a rate of 1 1/2 minutes per target (600 minutes or 10 hours) and break time at a rate of 5 minutes per half hour (3 hours), and double the sweep time to account for sweep overlap, then we come up with 22 hours total search time.
Good luck!