If no signal is obtained, change your direction from east to west,
from west to east, and from south to north.
When a signal is sensed, the antenna will turn towards the target
directly.
Follow the signal until the antenna turns back, this means that you
have walked past the target.
When this happens, confirm the location of the target from the four
directions (from south to north, from north to south, from west to
east, and from east to west).
Identify the search location by marking it as the focus of target
confirmation process.
NORTH TO SOUTH
SOUTH TO NORTH
EAST TO WEST
WEST TO EAST
