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Prep guides

Everything you need — one place to start

17+ cited guides on getting licensed, choosing a credential, and passing the exam. Not sure where to begin? Pick the path that fits you.

Start where you are

Getting licensed

6 guides

Start here — whether you need a license at all, the full path from logbook to credential, and what it costs.

Credentials

7 guides

OUPV (Six-Pack) versus Master, and how the 25 / 50 / 100-ton tiers are assigned.

OUPV (Six-Pack) License — Requirements, Exam, and Cost

OUPV Six-Pack requirements: 360 days of sea time, the CG-719K physical, the route-specific chart-plot exam, and where OUPV Inland actually ends — the 46 CFR Part 7 Boundary Line, not the demarcation line.

100-Ton Captain's License (USCG Master 100 GRT)

100-ton captain's license requirements: the sea time on inspected vessels, the broader exam (split Deck General/Safety and a tighter General module alongside the shared Chart Plot), and how the USCG Master 100 GRT credential assigns the 100 / 50 / 25 GRT limit under 46 CFR 11.422.

Master 50 GT — Mid-Tier Captain Credential

Master 50 GT sits between OUPV and Master 100, allowing operation of inspected passenger vessels up to 50 gross tons. Sea time, exam, and upgrade path.

25-Ton Master Captain License Requirements (Master 25 GT)

USCG Master 25 GT / 25-ton captain license requirements: sea time by route, inspected-vessel authority, tonnage evidence, exam modules, and upgrade path.

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

OUPV (Six-Pack) vs Master 25/50/100 — passenger limits, vessel size, sea-time differences, exam differences, and which credential makes sense for your operation.

Near-Coastal vs Great Lakes vs Inland — OUPV Routes

The three OUPV route endorsements under 46 CFR 11.467: near-coastal (100 miles offshore), Great Lakes and inland, and inland — which excludes the Great Lakes. Service months, demarcation lines, and exam differences.

Charter Fishing Captain's License — OUPV for Charter Operators

What charter fishing captains need: OUPV (Six-Pack) Near-Coastal or Inland. Sea time, exam, federal vs state requirements for guides on saltwater and freshwater.

Exam logistics

4 guides

Exam format and pass marks, approved courses, where to test, and renewal.

Exam modules

10 modules

The exam as the NMC divides it. Each module lists its topics — every topic page shows the rules it draws on, the source text behind them, and a sample question.

Rules of the Road

The largest, hardest module on the OUPV / Master exams. Combines the 38 International Regulations for Preventing Collisions at Sea (COLREGs) with the parallel set of 38 Inland Navigation Rules.

Deck General

Boat handling, stability, knots, and equipment. Tested in nearly every OUPV and Master sitting. Heaviest on practical seamanship knowledge.

Deck Safety

Firefighting, MOB recovery, distress signaling, and survival equipment. Heavy on regulation memorization (Subchapter T equipment requirements) and procedural execution.

Navigation General

Charting, plotting, fixes, currents, tides, magnetic variation. The "thinking" module — exam questions are computational rather than recall.

General Knowledge and Regulations

Mariner credentialing, drug testing, vessel documentation, and the broader legal/regulatory frame. Mostly recall.

Chart Plotting

The dedicated Chart Plot module — required on every OUPV and Master exam, not just the 100 GT tier. A standalone, 90%-pass module tested on paper charts: running fixes, set & drift, danger bearings, course-to-make-good. (OUPV Near Coastal = Q172, OUPV Inland = Q358, Master under 100 GT = Q163.)

AB Seamanship

Able Seaman (Able Seafarer) deck-rating gaps not already covered by the shared deck catalog. The AB exam (NMC AB01: Q450 Navigation General & Rules of the Road + Q451 Deck General/Safety, 50 questions / 70% each) reuses our Rules-of-the-Road, Navigation, Deck General, and Deck Safety modules; this module adds the AB-specific practical seamanship — marlinespike, cargo gear, helm/watchkeeping, lifeboatman, ground tackle, and emergency duties. Content floor: 46 CFR 12.405(b)-(d).

QMED — Oiler

Engine-room rating exam (NMC QMED03: Q804 Oiler Part I + Q805 Part II, 70 questions / 70% each). Motor and steam propulsion support, lube/fuel systems, watch duties, and engine-room safety. Topics derive from the Oiler column of Table 1 to 46 CFR 12.505(c). Weights are editorial — NMC publishes no per-subject question distribution.

QMED — Junior Engineer

The broadest QMED rating exam (NMC QMED01: Q800 Part I + Q801 Part II, 70 questions / 70% each) — a superset spanning motor and steam propulsion, full electrical, refrigeration/AC, hydraulics, thermodynamics, and maintenance. Topics derive from the Junior Engineer column of Table 1 to 46 CFR 12.505(c). Weights are editorial — NMC publishes no per-subject question distribution.

QMED — Electrician / Refrigerating Engineer

The electrical-and-refrigeration QMED rating exam (NMC QMED02: Q802 Electrician + Q803 Refrigerating Engineer, 70 questions / 70% each). DC/AC theory, motors and generators, switchboards, batteries, troubleshooting, and the refrigeration cycle. Topics derive from the Electrician/Refrigerating Engineer column of Table 1 to 46 CFR 12.505(c). Weights are editorial — NMC publishes no per-subject question distribution.

The Rules — hardest module

4 guides

The 90%-pass Rules of the Road. Read the rule, then drill it: every rule page links into the Rules-of-the-Road module.

Reference

4 guides

Surfaces that span every module.

Drill the exam you are actually sitting.

Real exam questions. No signup, no card.