🔍 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.