A parameter that is calibrated using vendor-provided values or values derived from pre-deployment procedures, and that is in scientific units. Quality Control (QC) is applied at this level, utilizing simple automated techniques and human inspection. Actions to transform Level 0 to Level 1 data are captured and presented in the metadata of the Level 1 data. Example: SBE-37IM CTD Temperature converted from hex to binary and scaled to produce degrees C.