Greenwell Boatworks — HIN at a glance
| Manufacturer | Greenwell Boatworks |
|---|---|
| City | Dameron |
| State | Maryland |
| Country | United States |
| MIC code | GBT |
| HIN format | USCG (12 characters) |
| Status | Active |
| Boat types | Open motorboat, Cabin motorboat |
Decode a Greenwell Boatworks HIN
Paste any HIN starting with GBT — we'll decode the serial number, build month, build year and model year instantly.
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About the USCG HIN format
Greenwell 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:
GBT 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 (GBT)
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.
Other Maryland boat manufacturers
- Atlantic Cruising Yachts LLC (
ATC) - Bavaria Yachts USA (
BAV) - Swain Boat Builders (
BAY) - Broad Creek Marine, LLC (
BRD) - Chesapeake Boats INC (
CHE) - Duffie Boatworks LLC (
DBQ) - Distribution French Products (
DFP) - Demaree Inflatable Boats (
DIB) - Egeberg Associates (
EBX) - Evan'S Boats, INC. (
EVR) - Eastport Yacht Company (
EYC) - Stagg Yachts INC (
FOP)
Frequently asked questions
What is the MIC code for Greenwell Boatworks?
Greenwell Boatworks is assigned USCG Manufacturer Identifier Code (MIC) GBT. All Greenwell Boatworks boat HINs begin with these three characters.
How long is a Greenwell Boatworks HIN?
Greenwell 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 Greenwell Boatworks still in business?
Greenwell 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.