Probability of Area (POA).
Also expressed in terms of a percentage, POA refers to the assigned probabilities (based on consensus among the overhead team) that the subject is contained within the respective segments in the search locale, including the area outside the locale which isn't being searched. POA forms the basis of establishing priorities for the assignment of search resources. They will always sum to 100, although individual POA's for individual segments will "shift" after being searched, according to mathematical formulas computed by the Plans Chief.