Additional duties: Serves as overall technical authority with respect to marine propulsion and auxiliary systems, has responsibility for the efficient operation, maintenance, and repair of all engines, generators, motors, auxiliaries, monitoring equipment, control systems, hydraulic controls, fire systems and pumps, and service systems, such as refrigeration, plumbing, heating, air compressors and mechanical and electrical distribution systems. To receive credit, submit a recent performance appraisal (dated within 18 months) showing the official rating of record, signed by a supervisor, or statement why the performance appraisal is unavailable (do not submit a performance plan) and/or incentive award documentation dated within the last 18 months (i.e. performance awards, special act or achievement awards, quality step increases, etc.).