🔍 Key Concepts
• 46 CFR requirements for marking the Official Number on small passenger vessels
• Differences between how the number must look (style/size), where it must be placed (location), and how it must be attached (tamper-evident)
• The idea that regulations often bundle several specific conditions together for identification and security
💭 Think About
• First, identify which options describe the appearance of the number, which describe the location, and which describe the security/tamper-evidence of the marking.
• Ask yourself: does the regulation focus on just one of these aspects, or does it usually combine multiple requirements to ensure the number is both visible and difficult to alter?
• Consider whether any one option alone would fully satisfy the Coast Guard’s need to clearly identify the vessel and detect tampering, or whether multiple conditions must be met.
✅ Before You Answer
• Verify in 46 CFR for small passenger vessels how the Official Number must be formed and sized (e.g., block type, minimum height).
• Check whether the regulation requires the Official Number to be placed on an interior structural part of the hull or on an exterior visible hull part.
• Confirm the requirement that the marking must be permanent or tamper-evident, so that any alteration, removal, or replacement would be obvious.