Determining the position of anything, such as a break in a cable, or a
grounding in a telegraph line. In ocean cables two typical cases are the
localization of a break in the conductor and of a defect in the
insulation admitting water. The first is done by determining the static
capacity of the portion of the line which includes the unbroken portion
of the conductor; the other by determining the resistance of the line on
a grounded circuit.