DOWN ISLAND TRADING CO HIN Decoder
Hull Identification Numbers beginning with DCU were assigned by the US Coast Guard to DOWN ISLAND TRADING CO of DEER HARBOR, WA. The company is recorded as out of business since 1981 — 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
DCU
Location
DEER HARBOR, WA
In business
since 1979
Status
Out of business (1981)
DOWN ISLAND TRADING CO hulls (1979–1981) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Free · no account · the HIN is on the transom, upper starboard (right) corner
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DOWN ISLAND TRADING CO HIN FAQ
What does a DOWN ISLAND TRADING CO HIN look like?
It starts with the three characters "DCU" — the Manufacturer Identification Code the US Coast Guard assigned to DOWN ISLAND TRADING CO — followed by a 5-character hull serial and a 4-character date code, 12 characters total. DOWN ISLAND TRADING CO hulls (1979–1981) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is DOWN ISLAND TRADING CO still in business?
USCG records list DOWN ISLAND TRADING CO as out of business since 1981. 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 DOWN ISLAND TRADING CO HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. DOWN ISLAND TRADING CO hulls (1979–1981) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984. 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, "DOWN ISLAND TRADING CO HIN Decoder," carwhere.com/hin-decoder/dcu, last verified 2026-06-12.