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 (NAVELEXSYSCOM). Consistent with these limitations of NAVFAC
responsibilities and within the scope of this manual, the contraband
detection and more sophisticated exterior sensor elements noted herein are
discussed only insofar as they may be Navy-wide considerations in
particularly sensitive or critical sites.
2.4.1.1
Examples of Detection Subsystem Elements Include:
a) Exterior sensors deployed singularly or in overlapping
configurations to maximize detection probability around protected area
perimeters. These sensors may be attached to barriers (fences, gates,
walls, etc.) or installed above or below ground. They use a variety of
phenomena to sense intrusions and require careful analysis, specification,
site engineering, and installation to ensure adequate performance. If
security vulnerabilities can only be solved by the installation of exterior
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