User's Manual

Noggin 11-Locate & Mark Mode
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3) Once the depth is matched, save the Soil Type value by pressing the Save button.
11.3.2.3 Soil Moisture
If a good target arch or a target of known depth is not available, the user will have to estimate the
Soil Type. The soil type is most strongly affected by water so the soil type options relate to the
amount of water in the soil.
Change the soil type by pressing the Soil Moisture button until the option that best describes the
soil in the area is displayed. The options are Very Dry, Dry, Moist, Wet and Very Wet Soil.
11.3.3 Identifying Air Wave Reflections
Some arches in the image can be caused by objects that are not in the subsurface, such as
posts, fences, overhead wires and even trees.
An important part of understanding the data image is learning to recognize these unwanted "air"
targets and differentiate them from the targets in the ground.
One way of identifying air reflections is to use the target arch method described above. However,
arches from above-ground objects are wider than objects in the ground and out of the range of
the maximum Soil Type.
Therefore, if the widest Indicator Arch is still not wide enough to match the target arch, the target
arch is from on object in the air, not the ground.