This site even displays a travel map to the establishment you are seeking. U.S. City's Information . This is a commercial site. A good place to search for a business throughout the U.S. Good if you are traveling by boat and have need for a maritime business, marina, etc. Simply click on a state or state name to find listings for that particular state.
All states contain national, state city and local listings.
Marine Resource Center A Source for marine services and information including a listing of marinas in the United States.