What is the primary function of Infra-Red Devices (IRD)?

The primary function of Infra-Red Devices (IRD) is to detect both foot and vehicular traffic. These devices utilize infrared technology to monitor heat signatures, allowing them to identify people and vehicles that may be moving through an area. This capability is particularly valuable in border patrol operations, where there is a need to monitor and secure vast stretches of terrain, often in challenging conditions.

Using IRD effectively enhances surveillance by enabling detection during nighttime or in low-visibility situations, making it a crucial tool for border security and preventing unauthorized crossings. This targeted application of infrared technology distinguishes it from other modalities, such as seismic sensors, which focus on detecting ground movement or vibrations, or video recording, which relies on camera technology rather than heat signatures. Additionally, detecting magnetic fields is not within the operational scope of IRDs, highlighting their specific design and application in monitoring human and vehicular movement across borders.