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Federal law and registrationQuestion 3 of 352

A registration number has letter and number groups. How must the groups be set apart?

  1. With a slash
  2. With a space or hyphen
  3. With a period
  4. With nothing at all
Show answer

Correct answer: With a space or hyphen

A space or hyphen, as wide as a letter, separates the groups. Example: DC 5678 EF.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 173: Vessel Numbering and Casualty and Accident Reporting, § 173.27 Numbers: Display; size; color

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Questions last reviewed: 18 October 2026