Boating Coach US
Boat capacity and constructionQuestion 320 of 352

Where is the primary hull identification number on a boat with a transom?

  1. On the port side of the bow
  2. On the starboard outboard side of the transom
  3. Under the engine cover
  4. On the cabin door
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Correct answer: On the starboard outboard side of the transom

The primary HIN goes on the starboard outboard side of the transom, near the top.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 181: Manufacturer Requirements, § 181.29 Hull identification number display

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Questions last reviewed: 18 October 2026