Electrical measurements represent an indirect measure of the velocity structure of an ocean current. An interpretation of such measurements requires consideration of many influences, including the distribution of the vertically averaged velocity, of the bottom topography, and of the electrical-conductivity structure of the ocean and the sea bed....
Sanford, T. B., and W. J. Schmitz. 1971. "A comparison of direct measurements and G.E.K. observations in the Florida Current off Miami." Journal of Marine Research 29, (3). https://elischolar.library.yale.edu/journal_of_marine_research/1223