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4.4.2 STEP 2 Pinpointing the Target
In Step 1, the area of a target was determined. If the metal in the target
is sufficiently small, the area mapped will also be small and therefore
it is a relatively simple matter to pinpoint the centre of the target. Move
the coil away from the mapped target and select Pinpointing Mode by
pressing and holding the yellow Mode Select button.
* WARNING *
Do not select Pinpoint Mode when the coil is above the target
as this may result in the target being masked.
To determine the centre, for larger targets, the coil should be slowly
moved across the mapped area. As the coil approaches the centre
of the target, the alarm tone will increase to a maximum volume.
Where maximum volume is achieved, the coil can be considered to
be above the centre of the target.
Once confirmed, local Standard Operating Procedures should be
followed to mark the target.
Maximum Volume
Figure 21: Determine target centre
NOTE
Against small targets, when the coil is above the target, the tone
may cease. Movement either side will cause a tone to occur. In this
instance, the centre of the target is indicated by the muting of the tone.
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