Figure F23. Characteristic deployments of the DVTPP and T2P. A. Good deployments are characterized by an abrupt rise during penetration and a subsequent dissipation. B. Fair deployment. Many deployments recorded a subhydrostatic pressure when the drill string was raised in order to decouple the probe from the ship's motion. With time, the pressure equilibrated upward toward what is inferred to be the in situ pressure. C. "Leak" deployments had abrupt drops in pressure during the dissipation phase. This is interpreted to result from leakage within the tool into the air-filled chambers within the tools.