MAC ARNOLD HIN Decoder
Hull Identification Numbers beginning with MQA were assigned by the US Coast Guard to MAC ARNOLD of WOCHESTER, MA. The company is recorded as out of business since 1994 — 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
MQA
Location
WOCHESTER, MA
In business
since 1985
Status
Out of business (1994)
MAC ARNOLD hulls (1985–1994) 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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MAC ARNOLD HIN FAQ
What does a MAC ARNOLD HIN look like?
It starts with the three characters "MQA" — the Manufacturer Identification Code the US Coast Guard assigned to MAC ARNOLD — followed by a 5-character hull serial and a 4-character date code, 12 characters total. MAC ARNOLD hulls (1985–1994) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is MAC ARNOLD still in business?
USCG records list MAC ARNOLD as out of business since 1994. 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 MAC ARNOLD HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. MAC ARNOLD hulls (1985–1994) 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 MA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "MAC ARNOLD HIN Decoder," carwhere.com/hin-decoder/mqa, last verified 2026-06-12.