Electromagnetic tracer of underwater pipelines

The main design relations, accuracy estimates, and the results of metrologi cal investigations are presented of an electromagnetic tracer for a towed u nderwater probe whose magnetometric output data are processed with a comput er The tracer makes it possible to increase the accuracy of measurement of the depth of underwater pipelines in the 3 to 10 m range to 5-6% or better and to reduce the efforts of pipeline tracing in navigable rivers by more t han an order of magnitude. Methods for additional reduction of pipeline tra cing errors are shown.