In order to interpolate between thermometrically determined depths of sampling in serial oceanographic observations it ha.s been customary to plot a curve of depth to wire length ratio against wire length. It is shown that a simpler and probably more accurate method consists of plotting wire length minus depth against wire length. In this method the surface wire angle is converted into a line of tangency to the curve which always terminates at the zero point of the graph. Furthermore, the limiting slope of this curve is more readily defined and utilized.
Pollak, M. J.. 1950. "Notes on determining the depths of sampling in serial oceanographic observations." Journal of Marine Research 9, (1). https://elischolar.library.yale.edu/journal_of_marine_research/716