The same geometry as Figure 13 but with more multiple reflections. The interval velocity of the sediment can be measured from the primaries. The sediment velocity can also be measured by connecting the simple multiple with the pegleg multiple. Transformation to one dimension by slant stack for deconvolution is a process that lies on the border between experimental work and industrial practice. One of its weaknesses is that it assumes lateral homogeneity in the reverberating layer.
Water is extremely homogeneous, but sediments at the water bottom can be quite inhomogeneous.