Question 58 RVR05 - Master of LT 100 GRT

The Correct Answer is B Option B ("It is required to be permanently marked on the vessel's structure") is correct because federal regulations governing vessel documentation mandate that the vessel's official number must be permanently affixed to a structural member of the hull. Specifically, US Coast Guard regulations (33 CFR / 46 CFR) require that the official number be carved, burned, stamped, or otherwise permanently marked into the main beam, hull structure, or frame of the vessel in a manner that is not readily removable. This internal marking serves as the definitive identification for legal and administrative purposes. **Why the other options are incorrect:** * **A) It is not required to be marked anywhere on the vessel:** This is incorrect. The official number is legally required to be marked both internally (permanently on the structure, as described above) and externally (usually on the stern, visible to the public). * **C) It is required to be painted on the vessel's stern:** This is incorrect as a description of the *official number* itself. While the vessel's name and hailing port *are* required to be marked (often painted) on the stern, the *official number* itself must be permanently marked on the structure (B) and is generally *not* displayed externally. * **D) It is required to be painted on the vessel's bow:** This is incorrect. The bow is typically where the vessel's name is marked, but there is no requirement to paint the official number there. Furthermore, the external marking requirements (Name and Hailing Port) are usually directed toward the stern, and the required permanent marking (Official Number) must be internal.