It's the Law: Before Going Out

Hull Identification Number

• The Hull Identification Number (HIN) is a unique, 12-digit or 17-digit number assigned by the manufacturer to vessels built after 1972.
• Hull Identification Numbers:
  • Distinguish one vessel from another.
  • Are engraved in the fiberglass or on a metal plate permanently attached to the transom.
• You should write down your HIN and put it in a place separate from your vessel in case warranty problems arise or your vessel is 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.

Example of a 12-digit HIN