CHILTERN MARINE CORP HIN Decoder
Hull Identification Numbers beginning with CIU were assigned by the US Coast Guard to CHILTERN MARINE CORP of SAN FRANCISCO, CA. The company is recorded as out of business since 1987 — 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
CIU
Location
SAN FRANCISCO, CA
In business
since 1985
Status
Out of business (1987)
CHILTERN MARINE CORP hulls (1985–1987) 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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CHILTERN MARINE CORP HIN FAQ
What does a CHILTERN MARINE CORP HIN look like?
It starts with the three characters "CIU" — the Manufacturer Identification Code the US Coast Guard assigned to CHILTERN MARINE CORP — followed by a 5-character hull serial and a 4-character date code, 12 characters total. CHILTERN MARINE CORP hulls (1985–1987) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is CHILTERN MARINE CORP still in business?
USCG records list CHILTERN MARINE CORP as out of business since 1987. 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 CHILTERN MARINE CORP HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. CHILTERN MARINE CORP hulls (1985–1987) 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 CA
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "CHILTERN MARINE CORP HIN Decoder," carwhere.com/hin-decoder/ciu, last verified 2026-06-12.