It's the Law: Before Going Out

Hull Identification Number

The Hull Identification Number (HIN) is a unique, 12-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.

Hull identification number