UNITED SUBMERSIBLE SYSTEMS HIN Decoder
Hull Identification Numbers beginning with UNJ were assigned by the US Coast Guard to UNITED SUBMERSIBLE SYSTEMS of PHOENIX, AZ. The company is recorded as out of business since 2005 — 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
UNJ
Location
PHOENIX, AZ
In business
since 1991
Status
Out of business (2005)
UNITED SUBMERSIBLE SYSTEMS hulls (1991–2005) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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UNITED SUBMERSIBLE SYSTEMS HIN FAQ
What does a UNITED SUBMERSIBLE SYSTEMS HIN look like?
It starts with the three characters "UNJ" — the Manufacturer Identification Code the US Coast Guard assigned to UNITED SUBMERSIBLE SYSTEMS — followed by a 5-character hull serial and a 4-character date code, 12 characters total. UNITED SUBMERSIBLE SYSTEMS hulls (1991–2005) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is UNITED SUBMERSIBLE SYSTEMS still in business?
USCG records list UNITED SUBMERSIBLE SYSTEMS as out of business since 2005. 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 UNITED SUBMERSIBLE SYSTEMS HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. UNITED SUBMERSIBLE SYSTEMS hulls (1991–2005) 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.
Other builders in AZ
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "UNITED SUBMERSIBLE SYSTEMS HIN Decoder," carwhere.com/hin-decoder/unj, last verified 2026-06-12.