Issue link: https://www.e-digitaleditions.com/i/1132978
July/August/September 2019 I 23 Detect Early detection of an attempted incursion anywhere along the perimeter is the objective of this application, which involves the deployment of an appropriate technology that can accurately detect unauthorized incursions and encompass large areas of space outside the perimeter boundary or immediately along the length of the perimeter. Some of the many detection technologies available include GPS tracking technology that provides real-time geo-spatial data for viewing perimeter activity, perimeter intrusion detection sensors, and ground-based radar. The selected technology needs to provide an appropriate level of notification of any attempted incursion in a very timely manner to support the immediate response by authorized personnel. Considerations for possible incursion routes, such as over, under or through, must be the primary paradigm in applying the appropriate detection to meet this element of security-in-depth. Additionally, the technology must also provide a level of performance that ensures a high probability of detection with a certain degree of immunity against invalid or nuisance alarm alerts. Nuisance alarms can be caused by outside sources, such as acoustical and environ- mental conditions, as well as non-human interaction (e.g., animals, birds, rodents). This technical concern stands above all others in the 5D strategy as the most critical and difficult to accomplish. When selecting protective measures, it is important that the equipment conforms to the needs of the threat, performs consistently in all environmental conditions, FIGURE 3: Managing or directing normal vehicle and pedestrian traffic to strategically controlled entry points to deny unauthorized access can be enhanced by supplementing with K-rated gates and barricades and the addition of HD video surveillance cameras. The greatest challenge in designing and implementing perimeter security measures based on the security-in-depth strategy lies in the very nature of the assets being protected and the potential threats facing those assets. and adapts easily to support future expansion as conditions, risks, and threats change. Deny The objective of this element is to deny—at the immediate perimeter boundary—entry to any unauthorized persons while allowing authorized persons to enter. The deny element typically involves configuration of the perimeter boundary to manage or direct normal vehicle and pedestrian traffic to strategically controlled entry points (Figure 3). As part of the overall 5D strategy, proper application of the deny element should also incorporate all elements of deter and detect in order to enhance the remaining non-traffic channeling areas of the perimeter against incursion. The use of physical access control system technology and the posting of manned security gates at the points of entry are considered among the best methods to channel vehicle and pedestrian traffic. These measures should be supplemented with protective lighting enhancements at an IL luminance of 21.52 lux (2.0 footcandles) or better, installation of K-rated gates, bollards or barricades, and the addition of HD video surveillance cameras; by doing so, the deny element of 5D strategy now forms part of the overall security program.