Figure 5: The models resulting from 1-dimensional inversion of the on-axis data. The vertical scale shows depth below the seafloor. Joint inversion of the 0.35 Hz and 11 Hz data to RMS 1.3 gives the model shown by the solid line, equivalent to the resistivity depth structure along the dashed line in Figure 4.. The long dashed line shows the model resulting from inversion of the 11 Hz data alone, which constitute the most 1-dimensional part of the dataset. The short dashed line is the model resulting from 1-dimensional inversion of the on axis TE-mode MT data (Heinson etal, this issue), which fits the CSEM data independently to RMS 1.55. The responses of these three models are plotted in (b). The jitter in the response results from the varying source--receiver geometry during the tow.