San Jose Navigation GPS Mobile Locator GM-158-USB Manual de usuario Pagina 32

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32
Fig. 5.2 Top: “Shallow” antenna. Bottom: “Mid” antenna
The two signatures in Figure 5.3 at the left side are water pipes. The one
on the left is made of PVC and the right is metallic. As seen the metallic
pipes give a sharper signature but the PVC pipe still is identified quite
simply.
Electrical Conduits
Unknown
Force Main
Water Main
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