- 11 -
Figure
17:
Searching
in
the
Vicinity
of
a
Chain
Link
Fence
Locating
and
Tracing
Barbed
Wire
You
can
often
trace
barbed
wire
from
old
fence
lines
buried
just
beneath
the
surface.
Even
if
the
wire
is
only
a
trail
of
rust,
it
can
still
be
detected
near
the
surface.
Tip
the
locator
a
little
lower
than
usual
(but
not
parallel
with
the
ground).
Examine
trees
for
bench
marks
and
bits
of
embedded
barbed
wire.
Then
hold
the
locator
parallel
to
the
direction
of
the
wire.
Figure
16:
Tracing
Barbed
Wire
from
Old
Fence
Lines
Searching
Areas
along
a
Chain
Link
Fence
Searching
in
the
vicinity
of
a
chain
link
fence
requires
a
reduced
sensitivity
setting
and
some
control
over
the
orientation
of
the
locator.
As
illustrated
in
Figure
17,
position
the
locator
horizontally
with
its
long
axis
perpendicular
to
the
fence.
This
ensures
that
the
upper
sensor
is
kept
away
from
the
fence.
Perform
the
search
by
slowly
moving
the
locator
forward
along
the
fence
while
also
moving
it
to
the
right
and
to
the
left.
As
you
move
forward,
this
technique
will
allow
you
to
search
an
area
several
feet
wide.
Listen
for
an
abrupt
drop
in
the
signal
(as
shown
by
the
null
in
Figure
18)
that
will
occur
when
the
lower
sensor,
located
1
‐
5/8
inches
from
the
end
of
the
locator,
is
directly
over
the
stake.
Any
variation
in
the
position
of
the
locator
will
produce
an
abrupt
rise
in
the
frequency
of
the
signal.
