Trouble shoots, electrical equipment, and circuits using appropriate test equipment to detect and effect required maintenance, repairs, or replacement requirements. Performs maintenance and repair of generators, switchboards, controllers, circuit breakers, electrical motors, distribution panels, alarm and lighting circuits. Conducts insulation resistance measurements of electrical cables to determine condition and effects repairs or replacements as required. Supervises and participates in the installation and/or alteration to electrical systems aboard ships. Maintains adequate inventories of electrical spare parts and requisitions replacements as required. Maintains electrical system maintenance histories notating date, and extent of repairs and/or alterations.