ROBERTS WELDING HIN Decoder
Hull Identification Numbers beginning with RSA were assigned by the US Coast Guard to ROBERTS WELDING of SEQUIM, WA. 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
RSA
Location
SEQUIM, WA
In business
since 1990
Status
Listed active in USCG records
ROBERTS WELDING hulls (1990–present) 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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ROBERTS WELDING HIN FAQ
What does a ROBERTS WELDING HIN look like?
It starts with the three characters "RSA" — the Manufacturer Identification Code the US Coast Guard assigned to ROBERTS WELDING — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ROBERTS WELDING hulls (1990–present) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is ROBERTS WELDING still in business?
USCG records list ROBERTS WELDING of SEQUIM, WA in the MIC database (registered 1990).
How do I decode the year on a ROBERTS WELDING HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ROBERTS WELDING hulls (1990–present) 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 WA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ROBERTS WELDING HIN Decoder," carwhere.com/hin-decoder/rsa, last verified 2026-06-12.