This paper describes the social characteristics of venereal disease patients aboard a US Navy destroyer. The research team administered questionnaires to 247 crew members at the outset of the ship's 7 month-overseas deployment. When the ship returned to home port, the research staff gathered demographic and occupational information plus disciplinary records, job performance ratings, and complete dispensary visit information for the deployment period. The morbidity data indicated that 48% of the entire crew experienced at least one case of VD, and of these VD patients, 38% had multiple infections. A set of variables that best predicted VD incidence was determined by means of multiple regression analysis. These variables included disciplinary record, pay grade, division or type of job ("blue-collar" versus "white-collar"), and education. Other variables that correlated with VD incidence were age, length of service, marital status, performance ratings, and verbal aptitude scores.