Near-Coastal vs Great Lakes vs Inland — OUPV Routes

Where the demarcation lines fall (33 CFR Part 80)#

33 CFR Part 80 — the COLREGS Demarcation Lines — fixes the exact boundary between the two rule sets. The lines run across harbor entrances, the mouths of bays and sounds, and the seaward ends of jetties, so the water just inside a sea buoy can be Inland while the water a few hundred yards farther out is governed by the International Rules.

Inside the lines you are on Inland Rules waters: bays, sounds, the Intracoastal Waterway, inland rivers, and — for navigation-rules purposes — the Great Lakes. Outside them the International Rules apply. That is what 33 CFR Part 80 decides, and it is all it decides.

Do not read the demarcation line as the credential boundary. The licensing regulations use a different line: under 46 CFR 10.107, inland waters are the navigable waters shoreward of the Boundary Lines in 46 CFR Part 7, and those are drawn for an entirely separate list of statutes (46 CFR 7.1). The two rarely coincide — 46 CFR 7.105 puts the Boundary Line for the whole Gulf Coast on the 12-mile territorial-sea limit, while 33 CFR 80.845 puts Galveston's demarcation line across the harbor entrance, roughly 12 miles inshore of it. Crossing a demarcation line changes which Rules of the Road you steer by; it is not by itself the edge of an OUPV Inland route.

The Great Lakes are the other place the two questions come apart: they sit inside the demarcation lines, but 46 CFR 11.467(b) says an OUPV endorsement issued for inland waters covers all inland waters except the Great Lakes. Great Lakes authority comes from either the near-coastal route or the separate Great Lakes and inland route described below.

The sea-time difference: 3 months on the route's own water#

Since the 25 November 2024 amendment (89 FR 93089), 46 CFR 11.467 states the OUPV service requirement in months, not days, and every route is built on the same 12-month base. Near-coastal: 12 months of experience in the operation of vessels, of which at least 3 months must be service on ocean or near-coastal waters. Great Lakes and inland: 12 months of service on Great Lakes or inland waters, of which at least 3 months must be operating vessels on Great Lakes waters. Inland: 12 months of experience in the operation of vessels, with no qualifying-water condition on top.

That is the practical fork for most applicants — each step up the route ladder is bought with 3 months on the water the route actually authorizes. If your logbook is entirely river, sound, or bay time, you can qualify for OUPV inland now, and you need 3 months of Great Lakes service or 3 months of ocean / near-coastal service before you can be endorsed for those waters. (46 CFR 10.107 still defines a year of sea service as 360 days and a day as 8 hours, so the 12 months you document are counted in days underway; see our sea-time guide for how the Coast Guard counts and documents them.)

The exam: Inland Rules vs International COLREGs#

The Rules-of-the-Road module of the OUPV written exam is keyed to your route. Inland candidates are tested on the Inland Navigation Rules (33 CFR Part 83). Near-Coastal candidates must additionally know the International Rules — the COLREGs — that govern waters outside the demarcation lines.

The two rule sets are written almost word-for-word the same, so the extra study load is not a second body of law. It is concentrated in the handful of rules that actually diverge, plus the higher passing standard the Rules module carries across every deck exam (90% on the Rules of the Road versus 70% on the other modules).

Where the two rule sets diverge#

The differences that matter on the Near-Coastal exam are concentrated in five rules. Rule 9 (narrow channels) carries extra Inland provisions for bends and obstructed channels. Rule 10 governs offshore Traffic Separation Schemes under COLREGs but Vessel Traffic Services inland. Rule 24 sets different towing lights and shapes. Rule 28 (vessels constrained by their draft) is a COLREGs-only signal with no Inland equivalent, because inland waters are not deep-draft ocean lanes. Rule 34 sound signals are the classic trap: under the Inland Rule 34 intent-signal version, manoeuvring whistle signals are signals of intent (you sound, the other vessel agrees, then you act), while under COLREGs they are signals of action (you sound as you actually alter course).

Our Inland-vs-International Rules comparison lays these five out side by side; a Near-Coastal candidate should be able to state each divergence cold before sitting the Rules of the Road.

The third route: Great Lakes and inland (46 CFR 11.467(d))#

Most comparison articles present OUPV as a two-way choice. The regulation does not. 46 CFR 11.467(d) creates a distinct endorsement for Great Lakes and inland waters, and it is the correct credential for a charter operator working Lake Michigan, Lake Erie, Lake Superior, Lake Huron, or Lake Ontario who has no ocean time to document.

The qualifying service is 12 months on Great Lakes or inland waters, at least 3 months of which must be spent operating vessels on Great Lakes waters. Compare that with the near-coastal route, which also authorizes the Great Lakes but demands 3 months of ocean or near-coastal service you may never have logged on a lake. For a Great Lakes-only operation, the Great Lakes and inland route is both the cheaper and the faster path — and unlike the plain inland endorsement, it is the one that actually authorizes the lakes.

The same route split runs through the Master credential. Under 46 CFR 11.455, Master of Great Lakes and inland self-propelled vessels of less than 100 GRT requires 1 year of total deck-department service, and to obtain authority to serve on the Great Lakes, 3 months of that service must have been on Great Lakes waters — otherwise the endorsement is limited to the inland waters of the United States excluding the Great Lakes. The tonnage tier (25, 50, or 100 GRT) is then assigned separately under the 46 CFR 11.422 formula, which is why two people with identical Great Lakes route authority can hold different tonnage limits. If more than six passengers or a larger inspected vessel is the goal, read the Master 100-ton requirements next; the route analysis on this page still applies.

How far offshore each lets you run#

OUPV Inland authority stops at the edge of inland waters — the 46 CFR Part 7 Boundary Lines, per the definition in 46 CFR 10.107 — not at the navigation-rules demarcation line. OUPV Near-Coastal extends authority to ocean waters not more than 100 miles offshore, plus the Great Lakes and all inland waters, under 46 CFR 11.467(b). Neither OUPV endorsement is valid for international voyages, and neither lets you carry more than six passengers for hire.

If your business plan is canyon fishing, bluewater reef trips, island runs that leave protected water, or any route that crosses the Boundary Line for your area, you need Near-Coastal. If you run a lake, bay, sound, or river operation that never leaves inland waters, Inland is the correct — and faster — credential. Where the two lines sit far apart, as on the Gulf Coast, check 46 CFR Part 7 for your own water rather than assuming the sea buoy is the limit.

Upgrading Inland to Near-Coastal later#

You do not have to choose perfectly the first time. An OUPV Inland holder can add the Near-Coastal route once the 90 ocean / near-coastal days are logged and documented, without re-taking the entire credential — the upgrade is processed against the same OUPV, with the Near-Coastal Rules-of-the-Road material added to the exam scope as required.

The usual path for a new charter operator who fishes mostly inside but occasionally runs offshore is to earn Inland first (faster to qualify), build the ocean days during the season, and upgrade to Near-Coastal at renewal or when the offshore work justifies it.