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Operations Manual

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c. Advance forward another sweep distance and approach the coil

from each side. Notice when the target signal is first heard ‘ this

will indicate the side boundaries of the target area. (See Figure 14.)

Figure 14 - Pinpointing a Small Target using Edge Detection

5.7 Pinpointing Large or Multiple Targets

If you have a large target or multiple targets it may be difficult to define

using the crossing method defined in section 5.6. It is therefore

recommended that the following procedure be used to define large or

multiple targets.

a. Pass the coil over the target at

increasing heights until you get

an indication of the main centre

(or centres) of metallic mass

(see Figure 15).

b. At normal search height, move the

coil from outside the detection zone

directly towards the centre of the

mass, and note where a clear

detection signal is heard.

c. Repeat this process at small intervals

around the whole target to provide an

outline of the shape of the target

(see Figure 16).

Figure 15 -

Passing the

Coil at increasing height

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Minelab F1A4 Manual de servicio Pagina 28