Garrett Metal Detector GTI 1500 Owner's Manual page 50

Radiating Size Array
While the TREASURE IMAGING touch pad
is being pressed and held, you may occa-
sionally observe a size reading that con-
tinues to change dramatically, with the
size appearing to "radiate" rapidly and
continually outward from the small oval
at the center. Garrett engineers call this
a "Radiating Array" effect, which indicates
that the target is too deep and/or too
small to determine an exact size.
It is likely, however, that the target is
either Size A at 6"; a Size B at 8"; Size C
at 10"; or Size D at 12". No depth reading
will be displayed while the Radiating Array
is occurring. The Array may also appear
when the target is significantly off-center
from the coil. Always remember that your
searchcoil must be centered directly over
the target to produce correct size and
depth information.
50 - Garrett Metal Detectors