ORIG AMERICAN OFFSHORE HIN Decoder
Hull Identification Numbers beginning with GSW were assigned by the US Coast Guard to ORIG AMERICAN OFFSHORE of SEABROOK, TX. The builder is listed in the USCG MIC database. Enter the full 12-character HIN below for build date, model year, and serial — free, no account.
MIC
GSW
Location
SEABROOK, TX
In business
since 1979
Status
Listed active in USCG records
ORIG AMERICAN OFFSHORE built hulls across both HIN eras (1979–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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ORIG AMERICAN OFFSHORE HIN FAQ
What does a ORIG AMERICAN OFFSHORE HIN look like?
It starts with the three characters "GSW" — the Manufacturer Identification Code the US Coast Guard assigned to ORIG AMERICAN OFFSHORE — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ORIG AMERICAN OFFSHORE built hulls across both HIN eras (1979–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three.
Is ORIG AMERICAN OFFSHORE still in business?
USCG records list ORIG AMERICAN OFFSHORE of SEABROOK, TX in the MIC database (registered 1979).
How do I decode the year on a ORIG AMERICAN OFFSHORE HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ORIG AMERICAN OFFSHORE built hulls across both HIN eras (1979–present): boats before August 1984 carry legacy straight-year or model-year date codes; later hulls use the current month-letter format. The decoder handles all three. Enter the full 12-character HIN above and the decoder works it out, including the legacy formats.
Other builders in TX
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ORIG AMERICAN OFFSHORE HIN Decoder," carwhere.com/hin-decoder/gsw, last verified 2026-06-12.