The present research develops the argument that actual job duties are a significant determinant of job satisfaction, especially intrinsic satisfaction. It is further argued that the degree of fit between job duties and interests in these job duties should be related to satisfaction. To test these hypotheses, data were collected on job duties (Position Analysis Questionnaire), job interests (Job Activity Preference Questionnaire) and job satisfaction (Minnesota Satisfaction Questionnaire) from 629 naval enlisted personnel on three aircraft carriers and associated air squadrons. The results indicated that satisfaction could be predicted from job duties, and that intrinsic satisfaction was better predicted than was extrinsic satisfaction. Only partial support was given to the hypothesis that discrepancy between interests and job duties could predict satisfaction. (Author)