It's the Law: Before Going Out on Your Vessel

Hull Identification Number

• The Hull Identification Number (HIN) is a unique, 12-character number, assigned by the manufacturer, to vessels built after 1972.
• Hull Identification Numbers:
  • Distinguish one vessel from another—the same as serial numbers distinguish one car from another
  • Are engraved in the fiberglass or on a metal plate attached to the transom
  • Should be recorded by the owner and put in a place other than the vessel in case warranty problems arise or the vessel is lost or stolen
• It is illegal to remove or in any way falsify a Hull Identification Number.
• If your vessel is homemade or built before 1972, or does not have a proper HIN, contact the Massachusetts Environmental Police, 1-800-632-8075, to inspect the vessel. The inspecting officer will affix a State-assigned Hull Identification Number (HIN) to the vessel.
• A HIN is needed to title and register your vessel.