This system of web-based models allows users to estimate boater spending and the associated economic impacts in terms of jobs, sales, income, and value added associated with the ownership (e.g., craft spending) and use (e.g., trip spending) of different sizes and types of recreational boats. Economic impacts may be estimated for a marina, groups of marinas (eg, in a harbor), a boat access/ launch site, or for all registered power boats and sail boats in a designated region.