The National Parks Service (NPS) is developing a visitor-focused program to reduce recreational impacts on marine resources within the Biscayne and the Dry Tortugas National Parks. The NPS program aims to remove and mitigate threats to resources by enabling visitors to avoid boat grounding, fishing violations, anchor damage, wildlife disturbance, invasive species introduction and pollution. In order to succeed with this program we will help NPS to fully understand local visitor use patterns, attitudes, perceptions and satisfaction levels as well as integrate this information into resource management, education and enforcement efforts.