THIRD COAST COMPOSITES HIN Decoder — MIC THD
Hull Identification Numbers beginning with THD were assigned by the US Coast Guard to THIRD COAST COMPOSITES of HOUSTON, TX. The company is recorded as out of business since 2016 — 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
THD
Location
HOUSTON, TX
In business
since 2009
Status
Out of business (2016)
THIRD COAST COMPOSITES hulls (2009–2016) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
How a THIRD COAST COMPOSITES HIN breaks down
A current-format (1984–present) Hull Identification Number is 12 characters. Using the example THD45678D424 (illustrative):
| Characters | Segment | In example | What it identifies |
|---|---|---|---|
| 1–3 | Manufacturer (MIC) | THD | Identifies THIRD COAST COMPOSITES, assigned by the US Coast Guard. |
| 4–8 | Hull serial number | 45678 | THIRD COAST COMPOSITES'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 THIRD COAST COMPOSITES? Check it before you pay.
THIRD COAST COMPOSITES is recorded out of business (2016) — 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
THIRD COAST COMPOSITES HIN FAQ
What does a THIRD COAST COMPOSITES HIN look like?
It starts with the three characters "THD" — the Manufacturer Identification Code the US Coast Guard assigned to THIRD COAST COMPOSITES — followed by a 5-character hull serial and a 4-character date code, 12 characters total. THIRD COAST COMPOSITES hulls (2009–2016) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is THIRD COAST COMPOSITES still in business?
USCG records list THIRD COAST COMPOSITES as out of business since 2016. 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 THIRD COAST COMPOSITES HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. THIRD COAST COMPOSITES hulls (2009–2016) 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 THIRD COAST COMPOSITES 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 "THD" MIC the same as a THIRD COAST COMPOSITES serial number?
No. "THD" is the Manufacturer Identification Code — characters 1–3 of the HIN — that identifies THIRD COAST COMPOSITES. The hull serial number is characters 4–8: THIRD COAST COMPOSITES'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 THIRD COAST COMPOSITES 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 THIRD COAST COMPOSITES records, the title, or a marine survey to confirm the exact model and configuration.
Other builders in TX
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, "THIRD COAST COMPOSITES HIN Decoder," carwhere.com/hin-decoder/thd, last verified 2026-06-15.