Garrett Metal Detectors Metal Detector GTI 1500 - Manual (Page 54)

Raising the coil an inch or two as you
scan over such soil is sometimes helpful.
Remember to keep the coil level and at
a constant height. Encrustation or patina
may also affect conductivity of the target,
resulting in improper classification.
Recovery (Treasure Imaging)
Locating your target precisely will enable
you to recover it by digging the smallest
hole possible. This is accomplished first
by pinpointing which also enables you to
utilize another function of the GTI 1500 for
measuring size and depth.
Begin to locate targets by first drawing
an imaginary "X" on the ground with the
searchcoil at the place where maximum
sound occurs. You can then utilize the real
"magic" of the Treasure Imaging mode and
learn size and depth.
Digging
Since the final step in recovery usually
entails digging, always make as small a
hole as possible. It is quicker, requires less
work and makes refilling easier. You should
always fill your holes.
5 - Garrett Metal Detectors