Images 55 and 56 provide another example of how observing a sign (in this case a top sign) from different perspectives significantly changes how easily it can be identified. To take this photograph, the individual only moved a distance of 1 m but went from a kneeling to a standing position. As well as providing evidence of potential post-conflict IED contamination being present, a sign can also provide evidence that contamination may not be present. Image 57 shows recent top sign transference that indicates that a person has climbed a ladder at an infrastructure site. This could lead to the identification and questioning of a key informant who could provide additional evidence that contamination may or may not be present, and a well-informed decision for the appropriate approach could then be made.
Image 57. Transference can even occur as a top sign
4.2.2.GROUND SIGN
This refers to a sign below ankle height and may include:
• Flattening – where IEDs have been buried in soft ground.
• Disturbance – where IEDs have been concealed in tarmac or other hard surfaces.
• Regularity – from command wires or physical links. These could be surface laid or buried.
• Discarded IED components.
IED signs
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