bca Tracker3 Owner's Manual page 10

Operating Instructions
Figure F
If the slide is wider than 40 meters and there is no last seen point, cover
the entire slide area by using switchbacks in the search pattern (Figure F).
If multiple rescuers are available, establish a search pattern where the
space between searchers is no more than 40 meters and the distance to
the edges is no more than 20 meters.
Prior to the signal search, be sure that all transceivers are turned to search
mode. Rotate Tracker3 slowly in all directions (Figure G) while moving
along your signal search pattern. While searching, be aware of other
physical clues, such as equipment or extremities protruding from the
snow surface. When no signal is detected, "SE" will flash in the distance
indicator. Once a signal is detected consistently, mark this spot and begin
the coarse search.
10
Signal search path with one searcher
(slide wider than 40 meters).
last seen area
20 m
20 m
Signal search path with multiple searchers
(slide wider than 40 meters).
last seen area
20 m 40 m
40 m
20 m
40 m
40 m 20 m
20 m