- NM2N here means National Master 200 NC, a U.S. Coast Guard National Maritime Center credential.
- The full Near Coastal route has five modules: Q100, Q150, Q151, Q152 and Q153.
- Q154 Navigation Problems: Oceans belongs to the Oceans option, not to Near Coastal.
- Upgrades and route extensions use reduced module sets, so your assigned modules may differ.
What NM2N Means on This Site
"NM2N" is an acronym several unrelated credentials share, which is a common source of confusion when you search for it. On this site, NM2N means National Master 200 NC: a mariner's license route governed by the United States Coast Guard National Maritime Center (NMC). It is a deck-department credential for Masters of vessels up to 200 gross register tons operating on Near Coastal waters.
If you landed here expecting a healthcare, IT or project-management certification, this is a different thing entirely. Nothing in this article applies to those credentials, and nothing about them applies here. For related definitions, see our short explainers on NM2N meaning and what NM2N stands for.
Who Issues It and What It Covers
The examination modules for this credential are published by the Coast Guard's National Maritime Center under the ONC05 scope (Oceans or Near Coastal, Master or Mate of vessels under 200 GRT). The selected credential for this site is the Near Coastal route within that scope.
The NMC publishes its modules and topic matrices publicly. This is not a secret syllabus. The guide this site references is the published deck examination guide effective March 24, 2014, with the relevant reference at section 2.1.1.3 (printed page 17). That document is not a newly issued 2026 blueprint, but current indexed NMC matrices corroborate the same module headings. Sources were reviewed October 11, 2026.
The Five Modules of the Near Coastal Route
The exact full-route module set for Near Coastal is Q100, Q150, Q151, Q152 and Q153. That is five modules, and we treat them as five unweighted preparation domains. The NMC does not publish percentage weights in the material reviewed here, so any site claiming precise domain percentages for this credential is guessing.
| Domain | Module | Focus |
|---|---|---|
| Domain 1 | Q100 | Rules of the Road: Inland and International |
| Domain 2 | Q150 | Deck General |
| Domain 3 | Q151 | Deck Safety |
| Domain 4 | Q152 | Navigation General: Oceans or Near Coastal, applied to the Near Coastal route |
| Domain 5 | Q153 | Navigation Problems: Chart Plot |
Domain 1: Rules of the Road: Inland and International (Q100)
Q100 covers the collision-avoidance rules that govern how vessels behave around each other, under both the Inland and International regimes.
- Know which rules apply where, since boundary lines determine the regime.
- Be fluent in lights, shapes, sound signals and right-of-way situations.
- Expect to apply rules to scenarios, not just recite them.
Domain 2: Deck General (Q150)
Q150 is the broad seamanship and vessel-operation module. It rewards practical, shipboard familiarity across many small topics rather than deep mastery of one.
- Breadth matters: plan for many short topics, not a few long ones.
- Connect terminology to real vessel handling experience where you can.
Domain 3: Deck Safety (Q151)
Q151 addresses safety on deck, including the practices and equipment tied to protecting the vessel and its people.
- Study safety procedures as workflows you could explain aloud.
- Pair equipment knowledge with the situations in which it is used.
Domain 4: Navigation General: Oceans or Near Coastal (Q152)
Q152's official title spans both Oceans and Near Coastal. For this credential it is applied to the Near Coastal route. Do not treat it as a second, separate navigation-general module; it is one module with a shared title.
- Study the concepts through a Near Coastal lens.
- Keep it distinct from the problem-solving work of Q153.
Domain 5: Navigation Problems: Chart Plot (Q153)
Q153 is specifically Chart Plot. It is not a generic stand-in for every navigation problem type, and it is the most hands-on module of the five.
- Plan for repetition: plotting is a skill built by doing, not reading.
- Expect precision to matter, so practice carefully and check your work.
For a deeper walkthrough of each area, see our NM2N exam domains guide.
Why "Route-Aware" Matters
Here is where many candidates get tripped up. The five modules above describe the full original route for Near Coastal. They are not a universal count of exams that every applicant must pass.
Reduced Module Sets for Upgrades
Separate increases in scope or grade carry smaller module sets. Two examples from the published material:
- Q150 + Q152 applies when moving from Great Lakes/Inland to Near Coastal, with Q100 added if a COLREGS limitation applies.
- Q156 applies when raising from Master Near Coastal under 100 GRT to Near Coastal under 200 GRT.
These are upgrade and route-extension modules. They are not extra domains stacked on top of the full original exam, and they should never be added to the five-module count.
Modules That Must Never Be Combined
Alternative Rules modules or Navigation General modules must not be counted together as simultaneous requirements. And Q154 Navigation Problems: Oceans belongs to the Oceans option. It is not part of the Near Coastal scope, so if a resource tells you to study it for this route, question the source.
Key Takeaway
The NMC determines your individual module assignment. Always rely on your actual approval to test, and treat any general module list, including ours, as orientation rather than your personal exam plan.
What the Packet Does Not Tell You
Honesty about gaps is more useful than false precision. The reviewed material does not establish:
- Percentage weights for any domain.
- A single overall question count or exam duration.
- Current fees.
- A population-level pass rate.
That is why we do not publish numbers for those on this site. If you want to understand how to think about difficulty and results without invented statistics, read how hard the NM2N exam is and what the data shows on pass rate. For money questions, confirm current fees directly with the NMC and the relevant testing channel before budgeting; our certification cost article explains how to approach that.
Who Needs This Credential
The Master 200 NC route suits mariners who want to command vessels up to 200 gross register tons on Near Coastal waters, or who are progressing from a lower-tonnage or narrower-scope credential. In practice that means professionals working in:
- Coastal towing and barge operations
- Passenger and charter vessel work
- Offshore support and supply on near-shore routes
- Fishing, research and survey vessels within tonnage limits
- Pilot, service and workboat fleets
Employers in these sectors generally look for the license appropriate to the vessel's tonnage and route. Whether the investment pays off depends on your sector and your current license, which we explore in whether the certification is worth it. We deliberately avoid quoting salary figures, since none are established for this credential in the source material; see the NM2N jobs and salary guide pages for how to research this qualitatively.
Eligibility and sea-service details are separate from the exam modules. Our requirements article covers how to think about qualifying before you worry about the tests themselves.
Sequencing Your Preparation
Because the five modules differ so much in character, how you order them matters more than any generic study routine. One sensible approach ties each block to what the module actually demands:
Q100 Rules of the Road
- Start here: rules vocabulary underpins navigation scenarios later.
- Drill lights, shapes and signals until recall is automatic.
Q150 Deck General and Q151 Deck Safety
- Cover the broad seamanship and safety material in short, frequent sessions.
Q152 Navigation General
- Build the concepts that Q153 will ask you to apply.
Q153 Chart Plot
- Reserve the most hands-on repetition for last, but begin light plotting practice earlier.
Chart plotting is a motor skill as much as a knowledge area, so spreading it across blocks beats cramming it. Our NM2N study guide expands on pacing, and the cheat sheet offers a compact review once you have the fundamentals.
Official Sources vs. Practice Tools
Treat the NMC's published modules and topic matrices as your authority for what is covered. Treat prep tools as a way to rehearse recall and application. Good practice material should mirror the module headings above, avoid reproducing real exam questions, and never claim issuer endorsement.
When you are ready to test your recall across all five domains, try the NM2N practice tests on the main site. They are organized around the same module groups described here, so you can focus on a weak area such as Chart Plot or Rules of the Road rather than working through everything at once. For scheduling mechanics, see exam dates and passing score, and remember that the specifics tied to your own approval take precedence over any general guidance.
You can also browse the full practice test hub to see how each domain is structured before committing to a study plan.
Frequently Asked Questions
It refers to National Master 200 NC, a U.S. Coast Guard National Maritime Center credential for Masters of vessels up to 200 GRT on Near Coastal waters. It is unrelated to other credentials that share the acronym.
Five: Q100, Q150, Q151, Q152 and Q153. Upgrades and route extensions use smaller module sets, so your own assignment may differ from the full list.
No. Q154 Navigation Problems: Oceans belongs to the Oceans option. Q153 Chart Plot is the navigation-problems module for the Near Coastal route.
Not in the source material reviewed. No domain percentages, single overall question count or duration are established, so treat any such figures from unofficial sources with caution.
The NMC determines your assigned modules. Check your approval to test, since upgrades and scope extensions can reduce the set well below the full five-module route.