Stewart River Boatworks — HIN at a glance
| Manufacturer | Stewart River Boatworks |
|---|---|
| City | Knife River |
| State | Minnesota |
| Country | United States |
| MIC code | SRB |
| HIN format | USCG (12 characters) |
| Status | Active |
| Boat types | Inflatable boat |
Decode a Stewart River Boatworks HIN
Paste any HIN starting with SRB — we'll decode the serial number, build month, build year and model year instantly.
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About the USCG HIN format
Stewart River Boatworks is registered with the US Coast Guard and stamps a standard 12-character Hull Identification Number on every vessel produced for the US market. The format breaks down as:
SRB NNNNN M Y YY └┬┘ └──┬──┘ │ │ └┬┘ │ │ │ │ └─ Model year (last two digits) │ │ │ └──── Production year (last digit, 1972 standard) │ │ └────── Production month (A=Jan, B=Feb ... L=Dec, skipping I) │ └──────────── Hull serial number (alphanumeric) └─────────────── MIC: Manufacturer Identifier Code (SRB)
Federal regulation 33 CFR § 181 requires every US-built or imported recreational vessel to display this HIN permanently on the upper starboard side of the transom, and a duplicate HIN in a hidden location inside the hull.
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Frequently asked questions
What is the MIC code for Stewart River Boatworks?
Stewart River Boatworks is assigned USCG Manufacturer Identifier Code (MIC) SRB. All Stewart River Boatworks boat HINs begin with these three characters.
How long is a Stewart River Boatworks HIN?
Stewart River Boatworks uses the US HIN format: 12 characters total. The first 3 are the MIC, followed by 5 serial-number characters, 1-letter month, 1-digit year, and 2-digit model year.
Is Stewart River Boatworks still in business?
Stewart River Boatworks is currently listed as active in the US Coast Guard MIC database (last published October 2019). Even out-of-business manufacturers' HINs remain valid identifiers for the boats they built.