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. They are engraved or stamped in the hull transom, or on a metal plate attached to the transom, or are printed on inflated rafts and kayaks.
• Record the HIN and put in a place separate from your vessel in case warranty problems arise or your vessel is stolen.
• If your vessel is homemade, the County Recorder may issue you a HIN, which you then must affix permanently to the transom.
• It is illegal to destroy, remove, cover, or mutilate a HIN.