Field Procedure 31
Practice a smooth sweep of the search coil from side-to-side keeping the coil close to the ground
throughout the swing. Each pass of the coil should take approximately 3 seconds from right to left, 3
seconds to return from left to right. Walk forward slowly. Take small steps no greater than half of a
normal stride. Make sure each pass of the coil overlaps the last by at least half the length of the loop. Do
not lift the coil at the end of each swing. Keep it close to the ground and at the same height at all times.
To become comfortable sweeping the loop does take some practice. Relax, loosen up and find a
comfortable grip on the handle. Premature fatigue may result from gripping the handle too tightly, an
improperly adjusted rod or elbow support, and limited body movement. Hold the handle loosely. Adjust
the rod and elbow support for comfort and keep the elbow strap loose. Use your arm, shoulder and even
your back a little to allow for a smooth even sweep of the coil.
6.5 Pin Pointing
Once an object has been found, move the coil off to one side of the target area and slowly swing the coil
over the area until it beeps directly over the target. Make notes of the area where it begins to give an
audio signal and where the signal begins to fade. Where the signal becomes stronger that is the point of
where the edge of the anomaly is and where the signal begins to fade is the other side.
In illustration 6.2 we are showing the different positions that are necessary to properly pin point an
anomaly. From "Position 1" sweep the detector over the anomaly, then go to "Position 2", repeat the
process and then at "Position 3" again. When this is done from three different sides then you will know
exactly how long and wide the anomaly is.
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