HARBOR MARINE HIN Decoder
Hull Identification Numbers beginning with HAC were assigned by the US Coast Guard to HARBOR MARINE of MILWAUKEE, WI. 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
HAC
Location
MILWAUKEE, WI
In business
since 1976
Status
Out of business (1983)
HARBOR MARINE hulls (1976–1983) 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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HARBOR MARINE HIN FAQ
What does a HARBOR MARINE HIN look like?
It starts with the three characters "HAC" — the Manufacturer Identification Code the US Coast Guard assigned to HARBOR MARINE — followed by a 5-character hull serial and a 4-character date code, 12 characters total. HARBOR MARINE hulls (1976–1983) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is HARBOR MARINE still in business?
USCG records list HARBOR MARINE 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 HARBOR MARINE HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. HARBOR MARINE hulls (1976–1983) 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 WI
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "HARBOR MARINE HIN Decoder," carwhere.com/hin-decoder/hac, last verified 2026-06-12.