Type II Searchers.
These are "open grid" searchers spaced more than 50 feet apart. (A grid consists of a line of searchers who move in a parallel fashion some designated distance, then step down and travel in the opposite direction.) This approach is used in heavily vegetated areas when it is expected that the subject will be responsive. The method is described as efficient, because it yields a high probability of detection per searcher-hour of effort, and relatively large segments can be covered during one shift.