When must the vessel’s certificate of registration be available for inspection?

The vessel’s certificate of registration must be available for inspection whenever the vessel is operated. This requirement ensures that authorities can verify that the vessel is legally registered and complies with relevant regulations at any time it is in use on the water. Having the certificate on hand signifies that the operator is adhering to the laws governing vessel operations, which helps maintain safety and accountability in maritime activities.

Options indicating that the certificate should only be available during specific situations—such as docking procedures, exclusively for commercial vessels, or only during safety inspections—do not encompass the broader legal obligation for vessel operators. Therefore, the correct answer reflects the necessity of having the registration accessible at all times while the vessel is in operation, ensuring compliance and promoting safe boating practices.