BLACKFIN MARINE INTERNATIONAL HIN Decoder — MIC GUQ
Hull Identification Numbers beginning with GUQ were assigned by the US Coast Guard to BLACKFIN MARINE INTERNATIONAL of OPA LOCKA, FL. The builder is listed in the USCG MIC database. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
GUQ
Location
OPA LOCKA, FL
In business
since 2003
Status
Listed active in USCG records
BLACKFIN MARINE INTERNATIONAL hulls (2003–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
How a BLACKFIN MARINE INTERNATIONAL HIN breaks down
A current-format (1984–present) Hull Identification Number is 12 characters. Using the example GUQ45678D424 (illustrative):
| Characters | Segment | In example | What it identifies |
|---|---|---|---|
| 1–3 | Manufacturer (MIC) | GUQ | Identifies BLACKFIN MARINE INTERNATIONAL, assigned by the US Coast Guard. |
| 4–8 | Hull serial number | 45678 | BLACKFIN MARINE INTERNATIONAL'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 BLACKFIN MARINE INTERNATIONAL? Check it before you pay.
Decoding the HIN confirms the year and serial, but not the safety record. 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
BLACKFIN MARINE INTERNATIONAL HIN FAQ
What does a BLACKFIN MARINE INTERNATIONAL HIN look like?
It starts with the three characters "GUQ" — the Manufacturer Identification Code the US Coast Guard assigned to BLACKFIN MARINE INTERNATIONAL — followed by a 5-character hull serial and a 4-character date code, 12 characters total. BLACKFIN MARINE INTERNATIONAL hulls (2003–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is BLACKFIN MARINE INTERNATIONAL still in business?
USCG records list BLACKFIN MARINE INTERNATIONAL of OPA LOCKA, FL in the MIC database (registered 2003).
How do I decode the year on a BLACKFIN MARINE INTERNATIONAL HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. BLACKFIN MARINE INTERNATIONAL hulls (2003–present) 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 BLACKFIN MARINE INTERNATIONAL 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 "GUQ" MIC the same as a BLACKFIN MARINE INTERNATIONAL serial number?
No. "GUQ" is the Manufacturer Identification Code — characters 1–3 of the HIN — that identifies BLACKFIN MARINE INTERNATIONAL. The hull serial number is characters 4–8: BLACKFIN MARINE INTERNATIONAL'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 BLACKFIN MARINE INTERNATIONAL 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 BLACKFIN MARINE INTERNATIONAL records, the title, or a marine survey to confirm the exact model and configuration.
Other builders in FL
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, "BLACKFIN MARINE INTERNATIONAL HIN Decoder," carwhere.com/hin-decoder/guq, last verified 2026-06-15.