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Official online boating safety course for Wisconsin Wisconsin Department of Natural Resources

It's the Law: Before Going Out

All operators are required to obey laws that regulate your vessel’s registration and operation.

Registering Your Vessel

You must have a Wisconsin Certificate of Number (registration) and expiration decals to operate a recreational vessel legally. Exceptions to the requirement to register a recreational vessel include:

  • Sailboats 12 feet of length or less and not equipped with a motor and sailboards
  • Manually propelled vessels that are not equipped with a motor or sail
  • Vessels registered in another state and using Wisconsin waters for less than 60 consecutive days

The Certificate of Number is obtained by submitting the proper application and fee to the Wisconsin Department of Natural Resources (DNR).

The Certificate of Number (registration card) must be on board and available for inspection by an enforcement officer whenever the vessel is operated.

If your vessel requires registration, it is illegal to operate it or allow others to operate your vessel unless it is registered and numbered properly.

Expiration Decal

Other Facts About Titling and Registration

Titling: Only vessels 16 feet or more in length require a Certificate of Title.

Expiration: Registration is valid for three years, beginning on April 1 and expiring on March 31 at the end of each three-year period. No vessel may be operated after March 31 without renewing the registration.

Duplicates: If a Certificate of Number is lost or destroyed, the vessel owner must apply to the Department of Natural Resources (DNR) to replace it with a duplicate Certificate of Number.

Buying or Selling a Vessel: Transfer of ownership of a vessel terminates the Certificate of Number and title.

  • The “buyer” must apply for a new registration and/or title on forms furnished by the DNR. The previous owner’s Certificate of Number and title must accompany the application.
  • Upon receipt of the required fee and application, the DNR will issue a new Certificate of Number and/or title.
  • After applying, the “buyer” may operate the vessel if a copy of the application is carried on board.
  • It is unlawful to transfer the number designated by the DNR from one vessel to another.

Changes Requiring Notification: The owner of a registered vessel must notify the DNR within 15 days of the occurrence of any of the following events.

  • The owner changes his or her address.
  • The owner transfers all or any part of his or her interest in the vessel.
  • The vessel is destroyed or abandoned.

Documented Vessels: Larger recreational vessels owned by U.S. citizens may (at the option of the owner) be documented by the U.S. Coast Guard. Call the USCG at 1-800-799-8362 for more information. Documented vessels also must be registered in Wisconsin.

  • The expiration decals must be displayed on either side of the vessel’s name on the transom, but it is not required to display the registration number.
  • If the expiration decals are not displayed beside the vessel’s name, then the registration number and decals must be displayed as they are for undocumented vessels.
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Wisconsin Department of Natural Resources
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The Handbook of Wisconsin Boating Laws and Responsibilities
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Online boating safety handbook last modified: April 22, 2008
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