DEEP SEA MARINE INC HIN Decoder
Hull Identification Numbers beginning with DSM were assigned by the US Coast Guard to DEEP SEA MARINE INC of LONG BEACH, CA. The company is recorded as out of business since 1994 — 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
DSM
Location
LONG BEACH, CA
In business
since 1989
Status
Out of business (1994)
DEEP SEA MARINE INC hulls (1989–1994) 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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DEEP SEA MARINE INC HIN FAQ
What does a DEEP SEA MARINE INC HIN look like?
It starts with the three characters "DSM" — the Manufacturer Identification Code the US Coast Guard assigned to DEEP SEA MARINE INC — followed by a 5-character hull serial and a 4-character date code, 12 characters total. DEEP SEA MARINE INC hulls (1989–1994) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is DEEP SEA MARINE INC still in business?
USCG records list DEEP SEA MARINE INC as out of business since 1994. 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 DEEP SEA MARINE INC HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. DEEP SEA MARINE INC hulls (1989–1994) 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, "DEEP SEA MARINE INC HIN Decoder," carwhere.com/hin-decoder/dsm, last verified 2026-06-12.