From Consumer Wiki
All amphibious vehicles, houseboats, motorboats, motorized sailboats, and sailboats over 8 feet long which do not have or are not required to have valid U.S. Coast Guard marine certificates must be registered with the California Department of Motor Vehicles.
DMV - Vessel Section
PO Box 942869
Sacramento, CA 94269-0001
United States Department of Homeland Security
U.S. Coast Guard, Marine Safety Office
District 11 Public Affairs
Building 42, Coast Guard Island
Alameda, CA 94501
The pilot boat takes the pilot out to tankers and container ships in ocean waters. After boarding, the pilot takes command of the ship and brings it into port.
California Board of Pilot Commissioners
Pier 9, Suite 102
San Francisco, CA 94111
The Boat Owners Association of the United States, Consumer Protection Bureau (CPB), (see below) serves as a mediator in disputes between dissatisfied boat owners and the marine industry. It accepts complaints against its members about safety defects, warranty service, poor work by dealers, and boat yards. CPB offers mediation between boat owners and the marine industry, monitors safety defect problems with the U.S. Coast Guard, and provides assistance with individual boating problems.
Boat Owners Association of the United States (BOAT/U.S.)
Consumer Protection Bureau
880 South Pickett Street
Alexandria, VA 22304
The Maritime Safety Operation assists association members only to provide a copy of the navigation rules for international waterways, boating safety, installation of propane stoves, heaters in recreational vehicles, free courtesy exam on boating.
Maritime Safety Operation
(800) 682-1796 - Recorded message only