The information contained within this reference compilation is intended to be a helpful guide for the marine engineer in solving problems or answering questions that he or she may encounter daily, as well as problems or questions that may be encountered on a much less common basis. A good deal of this information is also necessary knowledge for any tests or examinations that may be required for the advancement of his or her career in the marine industry. The source primarily used for the direction of this compilation has been the USCG merchant marine engineering question bank for motor-propelled vessels, accessible on the internet at www.uscg.mil/stcw/. Another source is experience. All units of measurement are in imperial/standard units unless otherwise noted. SI/metric units have been used where appropriate.