In this article, a computer model developed to simulate the movements of yachts (boats) in enclosed bays is discussed. The computer model uses multinomial logit model to find the probabilities for the boaters to select the next bay to visit. The model predicts the number of boats in each bay at the end of a day, the number of boats that visited each bay during the day, and the distribution of boater categories among the bays throughout the simulation time. As a case study, the model is applied to Gocek bays located at the west Mediterrnean coast of Turkey. To obtain the input data, a questionnaire was formed, and a detailed survey was carried out in Gocek bays. In addition to the questionnaires, the number of the boats anchored in the bays were observed in the field studies. The results obtained by the model are compared with the data obtained in the field. Comparisons show that the yacht movements and distributions at various anchor locations can successfully be predicted with the model. This model can be used as an effective tool in the management of coastal areas.