Patrols along search region boundaries are primarily intended to:

Patrols along search region boundaries are primarily intended to look for signs of the subject. This involves observing and tracking any clues such as footprints, disturbed vegetation, or personal items that might indicate the whereabouts or path taken by the person being searched for. This aspect of search and rescue operations is critical, as boundaries often represent the limits of the search area and can significantly affect both the success of the operation and the safety of search personnel.

While locating physical evidence, preventing unauthorized entry, and gathering environmental data are all important functions within the broader context of search and rescue operations, they are secondary to the primary objective of searching for signs that directly relate to the subject's location and movement. Through focused patrols at the boundaries, search teams can quickly assess whether the subject has exited the designated search area or determine potential paths they may have taken.