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License guide

OUPV vs Master — Which Captain's License Should You Get?

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The short answer

If you'll carry ≤6 passengers on an uninspected boat: OUPV. If you'll carry more than 6 passengers, or operate an inspected vessel: Master 25 / 50 / 100. Route and vessel-tonnage history decide whether the Master path is 360 or 720 days, and whether the limit lands at 25, 50, or 100 GRT.

Passenger limit#

OUPV is hard-capped at 6 PASSENGERS — not at six paying ones. 46 USC 2101 defines an uninspected passenger vessel under 100 gross tons as one "carrying not more than 6 passengers, including at least one passenger for hire", and a "passenger" is anyone aboard except the owner, the charterer, the master, and working crew. So four paying anglers plus three non-paying friends is seven passengers and outside the credential; the non-payers do not ride free of the count. Master 25/50/100 has no fixed passenger ceiling — it is the vessel's USCG Certificate of Inspection that sets the maximum.

Load line and tonnage basics

Reserve buoyancy expressed in long tons equals 1/35 of ______.

A question from a module this guide prepares you for, with the rule it cites. Answer it: that is question 1 of 5, and nothing is asked of you first.

Vessel inspection#

OUPV is for uninspected vessels (Subchapter C). Master is for inspected vessels (Subchapter T, K, etc.) — the boat itself must hold a Certificate of Inspection from the USCG.

Sea time#

OUPV: 360 days. Master less than 100 GRT is more route-sensitive: Near-Coastal uses 720 deck-department days on ocean or near-coastal waters, with Great Lakes and inland service substituting for up to 360 of them (46 CFR 11.428(a)); Great Lakes/Inland uses 360 total days, 90 of them on the Great Lakes for Great Lakes authority (46 CFR 11.455(a)). The 25 / 50 / 100 GRT tier is then assigned under the 46 CFR 11.422 tonnage formula, so a candidate can meet the route requirement but receive a lower tonnage limit if most service was on smaller vessels.

Exam difference#

OUPV Near Coastal: four modules — Rules of the Road, Deck General/Safety (combined), Navigation General, and Chart Plot (Q172). Master less-than-100: the same ground but with Deck General and Deck Safety split into two separate modules and a tighter regulations component, alongside its own Chart Plot module (Q163). Both credentials test plotting at a 90% pass mark; the Master's extra prep weeks come from the broader question bank and higher sea time, not from plotting being unique to Master.

Sources#

Every regulatory fact on this page is checked against the primary text: the Code of Federal Regulations and the U.S. Coast Guard National Maritime Center. Each entry shows the date we last retrieved it.

  1. 46 CFR 11.422 — Tonnage limits for Master or Mate under 200 GRT (eCFR)

    Retrieved

  2. 46 CFR 11.428 — Master less than 100 GRT Near Coastal service (eCFR)

    Retrieved

  3. 46 CFR 11.455 — Master less than 100 GRT Great Lakes and Inland service (eCFR)

    Retrieved

  4. 46 CFR 11.457 — Master less than 100 GRT Inland service (eCFR)

    Retrieved

  5. USCG NMC — Master less than 100 GRT Near Coastal checklist

    Retrieved

  6. USCG NMC — Master less than 100 GRT Great Lakes/Inland checklist

    Retrieved

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Earning the credential is paperwork. Passing the exam is the work.

Five questions from the papers this guide describes, cited to the rules you have just read. No signup, no card.