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Boat capacity and constructionQuestion 318 of 352

In a hull identification number, which letter shows a build month of January?

  1. A
  2. J
  3. B
  4. Z
Show answer

Correct answer: A

Character nine is a letter: A for January, B for February, and so on.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 181: Manufacturer Requirements, § 181.25 Hull identification number format

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Questions last reviewed: 18 October 2026