Overview and implementation of correct regulatory documentation, including but not limited to: EPA logs, USCG oil record book, sewage discharge, maintenance logs and Vessel Engine Room log books, ensuring all relevant information is logged and communicated at watch changes. Technical and operation understanding of all vessel auxiliary systems and their controls, theory of operation as well as practical Operation, including but not limited to: Purifiers, OWS, pumps, Sanitation system, Refrigeration plants, deck machinery LP hydraulic system, water makers, boilers, HVAC.