NOTE
To an experienced operator the shape of the mapped area can indicate whether
multiple targets may be present. However, the volume from the large target
may mask the volume of the smaller target and so great care is necessary for
accuracy. If the coil is moved very close to the ground, it will be easier to hear a
smaller target when close to a larger target.
Twenty
Three
Multiple Targets (Cont.)
o STEP 2 Determining the Centre
The pitch of the Threshold Tone will rise or fall depending on the
combination of metals or the composition of metal in a mine. This
means that, in some instances, experienced operators may be able to
identify one mine against another.
By slowly moving the coil across the mapped area, it may be possible
to detect tonal differences indicating multiple targets.
**WARNING**
The volume from a large target may mask that of a small target if the
small target is located very close to the large target.
To Next Page
Loading...
