The Chief Engineer is senior-most officer in the engine department and is responsible to the Master for the efficient operation of the engine room and machinery spaces aboard the vessel. Chief Engineers are responsible for refueling the vessel, monitoring performance of a deck and engine equipment, pumps and machinery. They routinely perform preventative maintenance to keep all the vessel equipment in tip-top shape, and they assist the Master in maintaining the vessels stability by monitoring and transferring liquid loads onboard the vessel.