Replacement Part List

from each other, and describe a line that passes right through the peak area.
You have just identified the two “Crossing Nulls”, and the line between
them indicates the lay of the line is parallel to the axis of the transmitter, and
we will assume for the moment that line is running straight through that point,
along the line of the Crossing Nulls. If you are in the middle of pushing the
transmitter 5 or 10 feet at a time and don’t need to know the depth yet, it’s
time to push it another 5or 10 feet, with a good general idea of which direction
it is heading. If it takes a bend, you’ll still have a good idea of where to look
for it.
Determine the Precise Depth
When you have reached the final point of your transmitter’s travel and have
carefully established the Crossing Nulls and marked them, as above, you are
ready to determine the depth. Walk away from the transmitter along the line
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