ROARING FORTIES BTWKS HIN Decoder
Hull Identification Numbers beginning with ZRF were assigned by the US Coast Guard to ROARING FORTIES BTWKS of MAPLE, ON. The company is recorded as out of business since 1985 — 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
ZRF
Location
MAPLE, ON
In business
since 1972
Status
Out of business (1985)
ROARING FORTIES BTWKS built hulls across both HIN eras (1972–1985): 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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ROARING FORTIES BTWKS HIN FAQ
What does a ROARING FORTIES BTWKS HIN look like?
It starts with the three characters "ZRF" — the Manufacturer Identification Code the US Coast Guard assigned to ROARING FORTIES BTWKS — followed by a 5-character hull serial and a 4-character date code, 12 characters total. ROARING FORTIES BTWKS built hulls across both HIN eras (1972–1985): 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 ROARING FORTIES BTWKS still in business?
USCG records list ROARING FORTIES BTWKS as out of business since 1985. 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 ROARING FORTIES BTWKS HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. ROARING FORTIES BTWKS built hulls across both HIN eras (1972–1985): 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 ON
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "ROARING FORTIES BTWKS HIN Decoder," carwhere.com/hin-decoder/zrf, last verified 2026-06-12.