What is necessary documentation for a boat?

National registration is crucial documentation for a boat because it provides proof of ownership and establishes the vessel's legal identity. This registration is typically required by federal authorities and can help in identifying the boat in cases of theft, accident, or other legal situations. Having a national registration also ensures compliance with maritime laws, which can vary depending on the type and use of the vessel.

Other documentation, such as local permits, state licenses, and insurance papers, may also be important based on specific regulations or requirements for operating a boat in particular waters. However, national registration serves as the foundational legal requirement that is recognized across state lines and by federal agencies, making it essential for all boaters.