Where must your boat's registration numbers be displayed?

On both sides of the forward half of the boat.

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  1. Across the stern under the name
  2. On the windshield
  3. Both sides of the forward half ✔

Why: 33 CFR 173.27 says numbers go on each side of the forward half of the boat, in plain vertical block characters at least 3 inches tall, reading left to right.

Huh, didn't know that: If you move your boat to a new state of principal use, the old number stays valid for 60 days.

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References

Answer: Both sides of the forward half. 33 CFR 173.27 says numbers go on each side of the forward half of the boat, in plain vertical block characters at least 3 inches tall, reading left to right.

  1. 33 CFR 173.27 Numbers: Display; size; color (eCFR) www.ecfr.gov/current/title-33/section-173.27
    Be painted on or permanently attached to each side of the forward half of the vessel
    Checked 2026-10-08.
  2. USCG A Boater's Guide to the Federal Requirements for Recreational Boats (2023) www.uscgboating.org/assets/1/AssetManager/Boaters-Guide-to-Federal-Requirements-for-Receational-Boats-20231108.pdf
    When a vessel is moved to a new state of principal use, the CON remains valid for 60 days.
    Checked 2026-10-08.

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