September 21, 2026
You buy the boat. You're already picturing paying guests on the bow. Then the paperwork starts, and two words get thrown around like they mean the same thing: documented and registered. They don't. Getting them confused is how new charter owners end up fined, uninsured, or stuck at the dock on a busy weekend.
Here's the plain-English version — what USCG vessel documentation actually does, what state registration covers instead, and which one your charter boat really needs.
A Certificate of Documentation (COD) is a federal record of your boat, issued by the Coast Guard's National Vessel Documentation Center (NVDC). Under 46 CFR Part 67, it "is required for the operation of a vessel in certain trades, serves as evidence of vessel nationality, and permits a vessel to be subject to preferred mortgages."
Read that again, because it's mostly about nationality and ownership. Documentation proves the boat is American and says who owns it. It does not, by itself, tell anyone how many passengers you can carry, where you can run charters, or whether you're insured. It's also not a state title. A boat of at least five net tons owned by a U.S. citizen is eligible; anything under five net tons can't be documented at all.
Documentation comes with an endorsement, and the endorsement is where charter owners get tripped up. There are four: recreational, coastwise, fishery, and registry.
The trap is the recreational endorsement. 46 CFR Part 67 is blunt: a recreation-endorsed vessel is for "pleasure use only," and the rule's own note warns it "may be bareboat chartered only for recreational use." Translation: a recreation-only boat cannot legally carry paying passengers for hire. If you're running charters between U.S. points, you need the coastwise endorsement.
State registration answers a completely different question: where does this boat operate? It's tied to your home waters, not your nationality. It's what puts the numbers on your bow and the validation decal on your hull, and it's usually where your sales-tax payment gets recorded.
Here's the part people miss. As The Boat Galley explains, a boat has either a state title or federal documentation to prove ownership — never both. But state registration is a separate requirement. Most states still make you register and display a decal even after you document, and only a small number exempt documented vessels from registration altogether. Federal paperwork does not get you out of your state's rules.
| USCG Documentation | State Registration | |
|---|---|---|
| What it proves | U.S. nationality and ownership; unlocks endorsements and a preferred mortgage | Ownership via state title, plus legal operation on state waters |
| Who requires it | Federal law, for 5+ net-ton boats in coastwise trade or the fisheries | Your state — most require it even for documented boats |
| Renewal | $26/year at the official NVDC rate; up to 5 years for $130 (no bulk discount, just fewer filings) | Varies widely by state, with its own cycle and fees |
| On the hull | Vessel name and hailing port; no state numbers | Registration numbers plus a validation decal |
A quick note on the hull: BoatUS points out that once a boat becomes documented, the state registration numbers and letters have to come off, though the tax validation sticker can stay per that state's rules. In their place, a documented boat displays its name and hailing port. Your hull identification number (HIN) — the ID stamped on the transom — stays with the boat either way. And your dinghy? It almost certainly falls under five net tons, so it can't be documented at all; it still needs its own state registration numbers, even hanging off a documented mothership.
This is the single biggest misunderstanding. Your endorsement gets you into the trade; it does not set how many guests you can carry. That's a separate question of inspection status.
Under 46 U.S.C. 2101, an uninspected passenger vessel — the classic "six-pack" — is a vessel under 100 gross tons carrying not more than six passengers, at least one of them for hire. A "passenger for hire" is anyone whose payment is a condition of the trip. Run that boat and you'll want your OUPV six-pack license.
The moment you carry seven or more paying passengers, everything changes. The boat has to operate as an inspected Small Passenger Vessel under 46 CFR Subchapter T, hold a Coast Guard Certificate of Inspection (COI) covering structure, stability, firefighting, and lifesaving gear, and you'll need a Master license instead of an OUPV. Passenger count and inspection status have nothing to do with your documentation — they're their own track.
"Coastwise trade" sounds like something for cargo ships. It isn't. 46 CFR Part 67 defines it as "the transportation of passengers or merchandise between points embraced within the coastwise laws of the United States." A charter that carries paying guests between U.S. points is coastwise trade.
So once your boat is five or more net tons and you're taking money to carry passengers, the law wants a coastwise-endorsed Certificate of Documentation — not a recreational one. The recreational endorsement is the cheap, easy default a lot of owners pick at purchase, and it's exactly the wrong one for a working charter boat.
This isn't theoretical. The charter magazine All At Sea warns that when a recreation-endorsed documented boat leaves Caribbean waters to pick up charter hire in the continental U.S., it's entering protected coastwise trade without the right endorsement — risking vessel seizure and forfeiture, plus civil penalties for carrying passengers without the required safety certificates and licensed crew.
Now layer insurance on top. A COI spells out your exact route, service, maximum passengers, and required gear; the Plimsoll Line guide notes that operating without a current COI, or outside what it allows, is a federal violation that brings civil penalties, possible criminal liability, and near-certain loss of coverage after an incident. No carrier pays out on a boat that was operating illegally. It's worth reading alongside the actual charter boat insurance requirements for six-pack operators.
Say you're documented and you head south for the season. Documentation is federal, so you're set nationwide, right? Not quite. Many states apply a "90-day rule": a visiting boat — documented or not — generally has to pick up that state's registration once it's used there beyond 90 days.
Florida handles this with a county-issued "Sojourner's Permit," and, as The Clever Boater notes, some counties actively enforce it against liveaboards and charter operators wintering locally. If you migrate with the season, check the rule before you overstay it.
If you're financing the boat, your lender may make this decision for you. One of the most common reasons operators document is that it lets a lender record a Preferred Ship Mortgage with the Coast Guard — federal maritime lien protection that works differently from a state-recorded lien. Many marine lenders simply require documentation on larger financed commercial vessels. If there's a loan on your charter boat, ask the question early.
Plenty of our readers run in the Caribbean, so one exception is worth flagging. In the U.S. Virgin Islands, vessels under 100 gross tons operate as uninspected six-packs — capped at six passengers — by default. But VIPCA notes the 2014 Howard Coble Act lets USVI-based six-pack vessels carry up to 12 passengers if the boat complies with the UK Blue or Yellow Code, now consolidated as MGN280. It's a real edge for charter boats in the territory — and a reminder that local rules can lift a federal-looking cap.
Run through these before you file anything:
Still deciding whether this boat is even the right one to build a business on? Our guide to what to consider before operating a charter boat is a good next read. And once the paperwork's sorted, the fun part is filling the boat — that's where charter boat booking software earns its keep, taking deposits and card payments straight from your own site.
Can a boat be both documented and state-registered?
For proving ownership, no — it's one or the other. But most states still require you to register and display a decal even after you document, so in practice you'll often deal with both.
Do I need documentation to run a six-pack charter?
It depends on size. Under five net tons you can't document and don't have to. At five-plus net tons carrying paying passengers between U.S. points, that's coastwise trade and you need a coastwise-endorsed COD. Documentation alone doesn't grant your passenger limit — your license and inspection status do.
What happens to my state numbers once I document?
They come off the hull. The state's tax-validation sticker can usually stay per that state's rules, and your boat then displays its name and hailing port instead.
Does documentation cover my insurance or set my passenger limit?
No. Documentation proves nationality and ownership. Passenger limits come from your inspection status and license; insurance is a separate policy that won't pay out if you were operating outside your legal authorization.
