two cross over a line that is at a right angle to the direc-
tion they are walking, the transmitter will energize the line
while the receiver detects the newly energized line.
e) At this time, the person carrying the transmitter should
move the transmitter back and forth across the line, caus-
ing a maximum response at the receiver. Thus the trans-
mitter may be centered over the line. If the transmitter is
placed on this spot, it will continue to energize inductively
the newly found line. Using the receiver, trace the line and
determine depth as you normally would.
f) NOTE: This method of finding an unknown line works only
if the operators cross the line at a roughly right angle.
Therefore, the operators may choose to sweep the area in
question in several directions, to assure that they cross all
unknown lines.
24
To Next Page