I applied the MZO operator to a series of depth variable velocity models. Each model consists of four diffractors placed at equal time depths. In Figure 2, I show the zero-offset section and the maximum constant-offset section for a velocity model with a linear increase in velocity. In Figure 3, I show the zero-offset section and the maximum constant-offset section for a velocity model with a more general depth variable velocity. The two velocity models are shown in Figure 4. The maximum constant-offset is 3325 m. The normal moveout correction and the dip moveout correction are, in essence, an approximation to the migration to zero-offset in a variable velocity medium. Ideally, after each process the flattened hyperbola generated by a diffractor in a constant-offset section should be migrated to a zero-offset hyperbola. The alignment of the events in Figures 5 and 6 should be a measure of success in migrating the constant-offset sections to zero-offset. Kinematically, the MZO operator shows better alignment, but the amplitude of the events is attenuated, due to the unsophisticated amplitude scheme I used for the MZO operator.