Trying to read the plate on the transom? Here is a club-simple Cobalt HIN / hull serial decoder — where to look, what the 12 characters mean, and why I ask for it when you list.
Every recreational boat sold in the U.S. since the early 1970s carries a Hull Identification Number (HIN). Think of it as the boat’s VIN. On a Cobalt it is usually molded or plated on the starboard aft transom (sometimes under a rub rail or swim-step cover). Match what is on the hull to the title and registration before you buy or sell.
Cobalt manufacturer codes (MIC)
The first three characters are the U.S. Coast Guard Manufacturer Identification Code:
- FGE — Cobalt Boats LLC (Neodesha, KS; historically Fiberglass Engineering). This is the MIC you will see on the vast majority of club boats
- CYT — Cobalt Yachts (brief Vonore, TN factory era). Far less common in our ads
If the first three letters are something else, you may be looking at a different brand, a re-power trailer tag, or a misread character. Squint again before you panic.
The usual 12-character layout
Most modern Cobalt HINs look like FGE#####X Y MM with no spaces — twelve characters total:
- Positions 1–3 — MIC (usually
FGE) - Positions 4–8 — hull serial — Cobalt’s own build serial (letters and numbers; I, O, and Q are avoided so they are not confused with 1 and 0)
- Position 9 — month of certification — a letter key (see table below)
- Position 10 — year of certification — last digit of the calendar year the boat was certified
- Positions 11–12 — model year — the two-digit model year stamped for that boat
Example shape (illustrative): FGE7W002F617 → MIC FGE, serial 7W002, month key F, certification year …6, model year 17. Decode the month with the table, then confirm against the title — do not buy on a forum guess alone.
Month letter key (current USCG format)
Under the Coast Guard “current” format used since the mid-1980s, position 9 maps like this:
| Letter | Month | Letter | Month |
|---|---|---|---|
| A | August | G | February |
| B | September | H | March |
| C | October | I | April |
| D | November | J | May |
| E | December | K | June |
| F | January | L | July |
That August-start calendar trips people up (A is not January). Older plates and a few “straight year” formats exist — if your twelve characters refuse to parse cleanly, photograph the plate and ask Cobalt customer care or your dealer rather than forcing a bad decode.
Model year vs. when it was built
Certification month/year and model year are related but not identical. Builders often certify late in one calendar year for the next model year. So a boat certified in late summer can still be a next-year model on the window sticker. When you compare two used Cobalts, read both the HIN and the seller’s claimed year — then check hours, options, and service, not just the last two digits.
Where owners get stuck
- Worn or painted-over plates — clean gently; do not grind. A clear phone photo in daylight helps
- Trailer VINs — different number; do not mix them into the boat HIN field on a listing
- Country prefixes — some import paperwork adds a country code in front; the U.S. HIN itself is still the twelve-character block
- Very early hulls — pre-standard or odd serials show up in the archive; Cobalt may not have build sheets that far back
Why MyCobalt asks for the HIN
When you list a Cobalt with me, the HIN is optional in the public ad copy, but I like to keep it on file. It helps match title paperwork, discourages duplicate or confused hulls, and someday I want a quiet serial index for the club. I will not plaster your full HIN in big type on the homepage unless you want it there.
Listing steps (pay, email specs/photos, go live) are in How to List Your Cobalt on MyCobalt. Rates stay $25 basic / $50 premium at mycobalt.net/advertise.
Quick decode checklist
- ☐ Find the plate on the starboard aft transom
- ☐ Confirm MIC is FGE (or rare CYT)
- ☐ Split serial / month letter / year digit / model year
- ☐ Match to title and registration before money moves
- ☐ Selling? Include year, model, HIN, hours, and photos when you email editor@mycobalt.net
Factory model pages still live on cobaltboats.com/models if you need current-book context while you decode an older hull. Questions on a weird plate? Hit editor@ — club hobby, not a title company, but I have stared at a lot of FGEs.
Photo credit: Cobalt Boats (factory R35). Related: how to list, used price ranges from our listings, advertise / list your boat.
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