Which of the following is a significant challenge during night searches in SAR operations?

Limited visibility is indeed a significant challenge during night searches in search and rescue (SAR) operations. During the nighttime, the absence of natural light substantially reduces the ability of search teams to see hazards, locate subjects, and navigate the search area effectively. This reduction in visibility can impair distance perception and spatial awareness, making it difficult for searchers to coordinate their movements and maintain communication with their team members. Such conditions can lead to delays in vital search efforts, increased risks of accidents, and ultimately impact the overall effectiveness of the operation.

In contrast, while high temperatures may affect SAR operations, they are not typically a concern during nighttime searches, which are often characterized by cooler conditions. Increased personnel fatigue can also be a factor, but it is more related to the duration of the search and prior exertion rather than a specific challenge tied to nighttime conditions. Lastly, while technology can be challenging to access in remote areas, it is not inherently more problematic at night compared to daylight hours; thus, it does not encapsulate the unique difficulties posed during night operations as effectively as limited visibility does.