Record section and ray diagram for station OBS57 deployed along the dip-line SO163-P15. Please refer to Fig. 6 for display information. The oceanic crust-mantle boundary is recorded by phase Pn. Strong phases PiP and Ploc track the lower oceanic crust. The plate boundary is recorded as a pre-critical reflection PbP. Phase Plmw tracks the lower margin wedge and the top of the lower margin wedge is recorded as wide-angle reflection PtlmP.