Samenvatting

It is well-known that instead of changing course exactly at the edge, changing course when the sweep radius reaches the edge (i.e. changing course at distance R from the edge) generally yields higher probabilities of detection. In this article the authors shall investigate whether or not an even higher probability of detection may be obtained, by turning at distance xR from the edge. They will discuss two questions: 1. If the barrier changes course at distance R from the edge, does this situation compared with changing course at the edge always lead to a higher probability of detection? 2. If the barrier changes course at the edge or at distance R from the edge, does one of these two situations lead to a maximum probability of detection?