CHARLEVOIX BOATWORKS HIN Decoder
Hull Identification Numbers beginning with XHH were assigned by the US Coast Guard to CHARLEVOIX BOATWORKS of CHARLEVOIX, MI. The company is recorded as out of business since 1983 — 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
XHH
Location
CHARLEVOIX, MI
In business
since 1979
Status
Out of business (1983)
CHARLEVOIX BOATWORKS hulls (1979–1983) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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CHARLEVOIX BOATWORKS HIN FAQ
What does a CHARLEVOIX BOATWORKS HIN look like?
It starts with the three characters "XHH" — the Manufacturer Identification Code the US Coast Guard assigned to CHARLEVOIX BOATWORKS — followed by a 5-character hull serial and a 4-character date code, 12 characters total. CHARLEVOIX BOATWORKS hulls (1979–1983) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is CHARLEVOIX BOATWORKS still in business?
USCG records list CHARLEVOIX BOATWORKS as out of business since 1983. 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 CHARLEVOIX BOATWORKS HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. CHARLEVOIX BOATWORKS hulls (1979–1983) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in MI
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "CHARLEVOIX BOATWORKS HIN Decoder," carwhere.com/hin-decoder/xhh, last verified 2026-06-12.