Point Last Seen (PLS)
This is determined by someone who actually saw the person and can pinpoint where they were on a map. This is useful if the point is somewhere along the intended route of travel or at location within the search area. It is useless when the PLS is the subjects home as they were leaving on the trip. Such as the wife who reports her husband overdue on a hunting trip. Last seen as he drove away and was going to hunt somewhere in Coos County.