With several modifications since Leg 164, the PCS was deployed 17 times during Leg 201 for two primary purposes: (1) to test the capabilities of the tool across a range of lithologies and depths and (2) to collect a series of cores from the seafloor to several hundred meters depth at a site where abundant evidence indicates extreme loss of gas on the wireline trip. Both objectives were accomplished fairly successfully. Eleven cores of >50 cm length were retrieved at >75% hydrostatic pressure. Another two PCS deployments collected cores <50 cm length but at >75% hydrostatic pressure, and another two PCS deployments came to the ship with cores >50 cm length but at <20% hydrostatic pressure. Only two PCS deployments, both taken on the Peru shelf, failed to recover a significant sediment core or core barrel at pressure. Of the sediment cores collected, all could be extruded as coherent masses except Core 201-1230A-25P. The tool definitely performed better during Leg 201 than during Leg 164. In summary, evidence from Leg 201 suggests that the PCS can operate successfully in a variety of deepwater settings. Moreover, cores collected at shallow sediment depth can be degassed, enabling the generation of gas concentration profiles from the seafloor to depth. Such a profile will be constructed postcruise for Site 1230.