Narrowing The Detection Area; Coin Depth Indicator - Garrett AT Pro Owner's Manual

Tip for narrowing the detection area: Large targets can
produce wide signals while pinpointing, making it difficult
to precisely locate the target's center. To help pinpoint, the
detector can be retuned to the target to narrow the detection
field as follows.
While holding down the Pinpoint pushbutton, move the
coil toward the target until the LCD just reaches a full-scale
response. Then, quickly release and depress the Pinpoint
button again to retune the detector and narrow its detection
field. Continue moving the searchcoil toward the target to
find its central peak response. If needed, repeat the retune
process to further narrow the target's response.
A quality hand-held pinpointer such as Garrett's Pro-
Pointer is a recommended accessory item to speed the target
recovery process and to aid in locating secondary targets.
Coin Depth Indicator—The depth of a coin, or similar sized
target, is indicated in 5cm increments. Note: targets larger
than a coin may display shallower than actual depth while
targets smaller than a coin may display deeper than actual
depth.
36 Garrett Metal Detectors