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Hull Identification Number (HIN)

All pleasure boat manufacturers in the United States are required to give each of their boats a unique identification number called a hull identification number (HIN). You can see the HIN for your boat on the starboard outboard side of the transom within two inches of the top of the transom, gunwale, or hull/deck joint, whichever is lowest.

Location of the HIN

Each HIN consists of 12 characters at least one-quarter of an inch high with no spaces, slashes, hyphens, or other symbols. The first three characters in every HIN are a manufacturer identification code. The U.S. Coast Guard issues a manufacturer identification code to all U.S. builders of recreational boats.

Characters four through eight of the HIN are the hull serial number, which consists of letters, numbers, or both. The ninth and tenth characters in each HIN indicate the month and year of the date of certification. In all other cases, characters nine and ten must indicate the date of manufacture. This date can either be (1) no earlier than the date construction or assembly began, or (2) no later than the date the boat left the place of manufacture or assembly, or (3) the date on which the boat was imported into the U.S. for the purposes of sale.

Character nine, the month of certification, is indicated using letters of the alphabet starting with January as A and ending with December as L.

A = January G = July
B = February H = August
C = March I = September
D = April J = October
E = May K = November
F = June L = December

Character ten is the last digit of the year of certification (or manufacture). Characters 11 and 12 are the last two numbers of the model year of the boat.

The HIN number below indicates a boat that was manufactured in June 2007.

Example HIN number

A duplicate HIN is located in an unexposed location on the interior of your boat or beneath a fitting or item of hardware.

When you register your boat, you will need proof of its HIN.


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