SUNSHIP MARINE HIN Decoder
Hull Identification Numbers beginning with GMU were assigned by the US Coast Guard to SUNSHIP MARINE of GULFPORT, MS. 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
GMU
Location
GULFPORT, MS
In business
since 1981
Status
Out of business (1981)
SUNSHIP MARINE hulls (1981–1981) 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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SUNSHIP MARINE HIN FAQ
What does a SUNSHIP MARINE HIN look like?
It starts with the three characters "GMU" — the Manufacturer Identification Code the US Coast Guard assigned to SUNSHIP MARINE — followed by a 5-character hull serial and a 4-character date code, 12 characters total. SUNSHIP MARINE hulls (1981–1981) predate the current HIN format — expect the legacy straight-year (MMYY) or model-year (M + year + month letter) date codes used 1972–1984.
Is SUNSHIP MARINE still in business?
USCG records list SUNSHIP MARINE 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 SUNSHIP MARINE HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. SUNSHIP MARINE hulls (1981–1981) 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 MS
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "SUNSHIP MARINE HIN Decoder," carwhere.com/hin-decoder/gmu, last verified 2026-06-12.