GREAT OUTDOOR BT CO HIN Decoder
Hull Identification Numbers beginning with GRX were assigned by the US Coast Guard to GREAT OUTDOOR BT CO of SAN RAFAEL, CA. The company is recorded as out of business since 1978 — 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
GRX
Location
SAN RAFAEL, CA
In business
—
Status
Out of business (1978)
GREAT OUTDOOR BT CO hulls (1972–1978) 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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GREAT OUTDOOR BT CO HIN FAQ
What does a GREAT OUTDOOR BT CO HIN look like?
It starts with the three characters "GRX" — the Manufacturer Identification Code the US Coast Guard assigned to GREAT OUTDOOR BT CO — followed by a 5-character hull serial and a 4-character date code, 12 characters total. GREAT OUTDOOR BT CO hulls (1972–1978) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is GREAT OUTDOOR BT CO still in business?
USCG records list GREAT OUTDOOR BT CO as out of business since 1978. 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 GREAT OUTDOOR BT CO HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. GREAT OUTDOOR BT CO hulls (1972–1978) 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 CA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "GREAT OUTDOOR BT CO HIN Decoder," carwhere.com/hin-decoder/grx, last verified 2026-06-12.