CUSTOM MARINE COMPANY HIN Decoder
Hull Identification Numbers beginning with GVM were assigned by the US Coast Guard to CUSTOM MARINE COMPANY of GLENDALE, AZ. The company is recorded as out of business since 1988 — 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
GVM
Location
GLENDALE, AZ
In business
since 1985
Status
Out of business (1988)
CUSTOM MARINE COMPANY hulls (1985–1988) 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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CUSTOM MARINE COMPANY HIN FAQ
What does a CUSTOM MARINE COMPANY HIN look like?
It starts with the three characters "GVM" — the Manufacturer Identification Code the US Coast Guard assigned to CUSTOM MARINE COMPANY — followed by a 5-character hull serial and a 4-character date code, 12 characters total. CUSTOM MARINE COMPANY hulls (1985–1988) all use the current HIN format: a month letter (A=January…L=December), a certification-year digit, then two model-year digits.
Is CUSTOM MARINE COMPANY still in business?
USCG records list CUSTOM MARINE COMPANY as out of business since 1988. 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 CUSTOM MARINE COMPANY HIN?
On current-format HINs the last two characters are the model year and the 9th–10th encode the certification month and year. CUSTOM MARINE COMPANY hulls (1985–1988) 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 AZ
Sources: USCG Manufacturer Identification Code database (uscgboating.org, refreshed monthly) · HIN format per 33 CFR 181 subpart C. Cite this page: CarWhere, "CUSTOM MARINE COMPANY HIN Decoder," carwhere.com/hin-decoder/gvm, last verified 2026-06-12.