SEA OX INC HIN Decoder — MIC USO
Hull Identification Numbers beginning with USO were assigned by the US Coast Guard to SEA OX INC of MOUNTAIN HOME, AR. The company is recorded as out of business since 1999 — common for older hulls, and useful to know when hunting parts or records. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
USO
Location
MOUNTAIN HOME, AR
In business
since 1997
Status
Out of business (1999)
SEA OX INC hulls (1997–1999) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
How a SEA OX INC HIN breaks down
A current-format (1984–present) Hull Identification Number is 12 characters. Using the example USO45678D424 (illustrative):
| Characters | Segment | In example | What it identifies |
|---|---|---|---|
| 1–3 | Manufacturer (MIC) | USO | Identifies SEA OX INC, assigned by the US Coast Guard. |
| 4–8 | Hull serial number | 45678 | SEA OX INC's own production number for the specific hull (the letters I, O, Q are never used). |
| 9 | Certification month | D | Month built — A=January … L=December (D = April). |
| 10 | Certification year | 4 | Last digit of the certification year. |
| 11–12 | Model year | 24 | The boat’s model year. |
Free · no account · the HIN is on the transom, upper starboard (right) corner
Buying this SEA OX INC? Check it before you pay.
SEA OX INC is recorded out of business (1999) — which affects recalls, parts support, and resale. The $9.99 Boat Report adds the full CPSC marine-recall check, a HIN consistency check, a verify-before-you-buy checklist, and the USCG builder record for this hull — one downloadable report, one-time, no subscription. See what's included
SEA OX INC HIN FAQ
What does a SEA OX INC HIN look like?
It starts with the three characters "USO" — the Manufacturer Identification Code the US Coast Guard assigned to SEA OX INC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. SEA OX INC hulls (1997–1999) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is SEA OX INC still in business?
USCG records list SEA OX INC as out of business since 1999. That's common for older hulls — the HIN still decodes normally, and the out-of-business date helps date the boat and guides parts-hunting toward salvage and owner groups rather than a dealer network.
How do I decode the year on a SEA OX INC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. SEA OX INC hulls (1997–1999) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Where is the HIN on a SEA OX INC boat?
On the outside upper-starboard (right) corner of the transom, within two inches of the top — required by 33 CFR 181.29. Since August 1984 an identical duplicate HIN is also molded into an unexposed interior location as an anti-theft measure. Both should match the title, registration, and insurance card exactly.
Is the "USO" MIC the same as a SEA OX INC serial number?
No. "USO" is the Manufacturer Identification Code — characters 1–3 of the HIN — that identifies SEA OX INC. The hull serial number is characters 4–8: SEA OX INC's own production number for that specific boat (the letters I, O, and Q are never used). The full 12-character HIN combines the MIC, the serial, and the date code.
Can a SEA OX INC HIN tell me the exact model?
Not on its own. A HIN encodes the builder, hull serial, certification month/year, and model year — not the model name or length. Match the decoded year and serial against SEA OX INC records, the title, or a marine survey to confirm the exact model and configuration.
Other builders in AR
Sources: verified against the USCG Manufacturer Identification Code database (refreshed monthly) · HIN format per 33 CFR Part 181, Subpart C. Reviewed by Sam Reynolds, Lead Researcher, CarWhere. Cite this page: CarWhere, "SEA OX INC HIN Decoder," carwhere.com/hin-decoder/uso, last verified 2026-06-15.