Garrett Ace 350 Owner's Manual page 33

Traditional pinpointing technique using Pinpoint pushbutton.
Note: It is important to maintain a constant searchcoil height
above the ground (e.g. 1 inch) during the entire Pinpointing
process to prevent ground mineralization from producing
false signals or masking the target's signal.
• Alternative pinpointing technique: DD-wiggle. Quickly
locate targets without using the Pinpoint button as follows.
Continuously swing the searchcoil side-to-side using
fast, narrow swings of 2 to 4 inches (i.e. wiggle). While
continuing this side-to-side wiggle, slowly move the searchcoil
sideways toward the target's suspected position until the
audio response produces a consistent, symmetric beat. This
indicates the lateral left-to-right position of the target. Then
locate the target's front-to-back position by rotating around
90° and repeating the same process.
32 Garrett Metal Detectors