Pinpointing Procedure - Minelab F3 Mine Detector Operation Manual

6.5 Pinpointing Procedure.

The design of the F3 makes pinpointing accurate and fast. The F3‟s
monoloop coil means there are no gaps in sensitivity around the
coil‟s circumference or across its surface. Pin-Pointing is conducted
as follows:
a. STEP 1
 Having detected a target and obtained a rough idea as to its size
and location using the sweeping procedure, the precise location
of the target can be "mapped" using the F3‟s "Edge Detection"
technique.
 Edge Detection makes use of the coil‟s consistent sensitivity
around its circumference to detect the area of a target. To
conduct edge detection, the coil should approach the target
location from a variety of angles as shown in Figure 25.
 As the coil approaches the target, the Threshold Tone will change
indicating the coil is in close proximity to the target.
change of the Threshold Tone, the operator should mentally mark
the position on the ground, move the coil away, and approach the
target from another angle.
 This process continues until the operator achieves a mental
picture of the target area.
Mapping the Target
Figure 25: Mapping the Target
37
At the