- Why There Is No Single Passing Score to Memorize
- What the Coast Guard Actually Publishes
- Your Modules Depend on Your Approval to Test
- The Five Preparation Groups for the Full Route
- Q100 vs. Q300: Alternatives, Not Extras
- Raise-of-Grade Modules Are Not Extra Domains
- Preparing Module by Module Instead of Chasing a Number
- Scheduling Your Study Around the Modules
- Common Misreadings of the Scoring Question
- Frequently Asked Questions
- The Coast Guard National Maritime Center publishes the modules and topic matrices for GLI05, not a single universal passing score.
- A full-route Great Lakes and Inland applicant prepares for five modules: Q100, Q340, Q341, Q342 and Q343.
- Q100 and Q300 are alternatives for the Rules of the Road requirement and must never be counted as two separate hurdles.
- Q345 and Q346 are separate raise-of-grade or route modules, not extra domains for a Master-original applicant.
Why There Is No Single Passing Score to Memorize
If you searched for the NM2GI passing score hoping for one clean percentage, here is the honest answer: for National Master 200 GL and Inland (NM2GI), the sources reviewed for this article do not establish a single overall passing percentage, a single overall question count or a single overall duration. Anyone quoting one flat number for the entire credential is either guessing or borrowing it from a different exam.
That matters because the National Master 200 GL and Inland pathway is not one test. It is a route assembled from several issuer-published examination modules administered under the United States Coast Guard National Maritime Center (NMC), within the GLI05 scope: Master or Mate less than 200 GRT. What you must pass depends on which modules are assigned to you, and each module is its own hurdle. For a broader orientation to the credential, see What Is NM2GI? and NM2GI Certification.
What the Coast Guard Actually Publishes
The NMC does not keep this exam a mystery. It publicly publishes the module list for each endorsement and a topic matrix describing what each module covers. That is the real, usable form of "what you need to pass": a defined set of modules, each with a published scope.
The sources reviewed on October 11, 2026 included the NMC's Great Lakes and Inland endorsements page, the GLI05 Master/Mate less than 200 GRT page covering Q342 through Q346, and the NMC deck and engineering examination guide. One caveat is worth stating plainly: that guide is the published regulations-effective March 24, 2014 document, not a newly issued 2026 blueprint. Current indexed NMC matrices corroborate the same module headings, which is why the module structure below can be presented with confidence, while anything about 2026-specific scoring thresholds cannot.
The relevant published guide reference is section 2.1.2.3, printed page 27. If you want to verify module descriptions yourself, that is the place to start, alongside the live NMC pages.
Key Takeaway
Stop searching for one number and start collecting the module list on your approval to test. Your preparation target is mastery of each assigned module's published topic matrix, not clearing a blended average.
Your Modules Depend on Your Approval to Test
The NMC determines the individual's assigned modules. Your approval to test is the controlling document. Two applicants who both say they are "going for the 200 ton Master" can legitimately sit different module sets depending on route, prior credentials and how the application was evaluated.
This is why the number of preparation groups is not a universal count of examinations for every applicant. The five groups described below represent the full-route structure for a Master-original path. If you hold a related credential and are upgrading, your assignment may be narrower. If your route involves a limitation, it may substitute one module for another.
Before you spend money on study materials, confirm what the NMC actually assigned. Eligibility questions that come before this step are covered in NM2GI Requirements 2026: Eligibility, Prerequisites & How to Qualify, and the cost side of registration is discussed in NM2GI Certification Cost 2026. Note that current fees are not established by the material reviewed here, so check the NMC directly rather than relying on any quoted amount.
The Five Preparation Groups for the Full Route
For the full-route Great Lakes and Inland structure, preparation organizes into five module groups. They are presented here as unweighted, route-aware groups because no domain percentages are established in the published packet. Do not assume equal weighting, and do not assume any group is "worth more" than another.
Group 1: Rules of the Road (Q100)
Inland and International navigation rules. This is the Rules of the Road module for the Great Lakes and Inland route.
- Know both rule sets and where they diverge
- Expect to apply rules to situations, not just recite them
- Inland-only Q300 is the alternative for the applicable restricted route
Group 2: Deck General (Q340)
The broad seamanship and vessel-operation knowledge base expected of a master or mate on a vessel under 200 GRT.
- Read the published topic matrix line by line
- Treat any topic you cannot explain aloud as a gap
Group 3: Deck Safety (Q341)
Safety knowledge for the deck department, including the operational and regulatory material the matrix lists.
- Pair regulatory recall with practical scenario thinking
- Confirm scope against the current NMC matrix, since the underlying guide predates 2026
Group 4: Navigation General, Great Lakes and Inland (Q342)
Navigation theory and practice specific to Great Lakes and inland waters.
- Route-specific content is the point of this module
- Do not substitute generic coastal or ocean navigation study
Group 5: Navigation Problems, Chart Plot (Q343)
Applied chart work. Q343 is required in the full-exam structure and must not be omitted from your plan.
- This is a working skill, not a memorization task
- Practice with the tools and chart conventions you will use at the exam
For a deeper walkthrough of how these five areas fit together, read NM2GI Exam Domains 2026: Complete Guide to All 5 Content Areas.
Q100 vs. Q300: Alternatives, Not Extras
The single most common counting error is treating Q100 and Q300 as two separate requirements. They are not. They are alternatives that satisfy the same Rules of the Road slot.
| Route | Rules of the Road module | Remaining modules | Total modules |
|---|---|---|---|
| Great Lakes and Inland | Q100 | Q340, Q341, Q342, Q343 | 5 |
| Inland | Q100 OR Q300 | Q340, Q341, Q342, Q343 | 5 |
Great Lakes and Inland uses Q100. Inland may use Q300 when the applicable COLREGS limitation is accepted. Choosing Q300 narrows the rules content to the inland-only set, which has a real consequence: the limitation attached to your credential. That is a career decision, not just a studying shortcut, so weigh it against the employment you want. Hiring context is covered in NM2GI Jobs.
Raise-of-Grade Modules Are Not Extra Domains
The Q342 to Q346 range on the NMC's GLI05 page includes modules that exist for specific applicant situations, and they are easy to misread as additional hurdles for everyone.
- Q345, Navigation and Deck General/Safety: a separate module for the Master less than 100 to Master/Mate less than 200 raise-of-grade route.
- Q346: a separate route for an OUPV moving to Mate less than 200. It is not an extra Master-original module.
Separate upgrade, raise-of-grade and route-extension modules are not additional full-original-exam domains. If you are a Master-original applicant on the full route, Q345 and Q346 are not stacked onto your five groups. If you are an upgrading mariner, your assignment may center on them instead of the full set.
This is the heart of why a single "passing score" framing breaks down: different applicants are literally taking different combinations of modules. Difficulty also varies accordingly, which is explored in How Hard Is the NM2GI Exam? Complete Difficulty Guide 2026.
Preparing Module by Module Instead of Chasing a Number
Because no blended percentage is established, the productive question changes from "what score do I need?" to "have I demonstrably mastered each module's published scope?" A few practical standards help.
Treat Each Module as Its Own Pass/Fail Event
Do not plan to offset a weak module with a strong one. Prepare as if every assigned module must stand on its own. Chart Plot (Q343) is the clearest example: strength in memorized rules will not rescue weak plotting, and the reverse is equally true.
Use the Topic Matrix as Your Checklist
The NMC's topic matrices are the closest thing to a scoring blueprint that exists in the published material. Convert each line into a question you must be able to answer from memory or work out on a chart. Anything you hesitate on goes on a remediation list.
Respect the Scope Boundaries
Use practice material that matches your actual route. Great Lakes and Inland navigation content differs from ocean-oriented content, and the Rules of the Road module you were assigned determines which rule set deserves your attention. The study sequence in NM2GI Study Guide 2026: How to Pass on Your First Attempt can help you organize this, and the NM2GI practice test site is a convenient place to rehearse question-style recall once you know your module list.
Scheduling Your Study Around the Modules
If you are on the full route, one sensible sequencing logic is to front-load the module that demands applied skill and finish with the one that is closest to pure recall. This is a suggested plan, not an official requirement, and you should adjust it to your assigned set.
Chart Plot (Q343)
- Start early because plotting fluency takes repetition
- Work problems by hand until the method is automatic
Navigation General (Q342)
- Build route-specific Great Lakes and Inland knowledge
- Connect theory to the plotting you already practiced
Deck General (Q340) and Deck Safety (Q341)
- Work through each published matrix topic
- Log every gap and revisit it
Rules of the Road (Q100 or Q300)
- Review close to test day so the rules stay fresh
- Confirm which rule module your approval actually assigns
A compact reference for last-week review is available in NM2GI Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Common Misreadings of the Scoring Question
Several recurring misunderstandings are worth naming, because each one leads candidates to either over-prepare or under-prepare.
- "There is one passing percentage for the whole credential." The published material reviewed here does not establish one. Verify with the NMC.
- "Five modules means five exams for everyone." The five-group structure describes the full route. Your assignment may differ.
- "Q100 and Q300 are both required." They are alternatives.
- "Q345 and Q346 are bonus domains." They are separate raise-of-grade and route modules, not extra Master-original content.
- "A 2026 blueprint changed everything." The guide reviewed is the March 24, 2014 regulations-effective document, with current matrices corroborating the module headings. No new 2026 blueprint is established here.
- "Pass rates tell me the cutoff." A population pass rate is not established in the packet reviewed, and a pass rate is not a passing score anyway. For what is and is not known, see NM2GI Pass Rate 2026: What the Data Shows.
Key Takeaway
Write down your assigned module list the day your approval to test arrives, cross-check it against the published matrices, and build your entire plan from that list. It is the only reliable definition of "what you need to pass."
Frequently Asked Questions
The material reviewed for this article does not establish a single overall passing percentage, question count or duration for National Master 200 GL and Inland. Preparation should target mastery of each assigned module's published topic matrix, and you should confirm any scoring detail directly with the Coast Guard National Maritime Center.
For the full Great Lakes and Inland route, five: Q100, Q340, Q341, Q342 and Q343. The Inland route also has five, with Q300 allowed in place of Q100 when the applicable COLREGS limitation is accepted. Your individual count is set by the modules assigned in your approval to test.
No. They are alternatives satisfying the same Rules of the Road requirement. Great Lakes and Inland uses Q100, while Inland may use Q300 under the applicable limitation. Counting them together is a frequent error.
No. Q345 is a separate raise-of-grade module for Master less than 100 to Master/Mate less than 200, and Q346 is a separate OUPV-to-Mate less than 200 route. Neither is an extra module for a Master-original applicant on the full route.
The NMC publishes the Great Lakes and Inland endorsement pages, the GLI05 Master/Mate less than 200 GRT page and a deck and engineering examination guide. Note that the guide is the March 24, 2014 regulations-effective document, so check the live NMC pages and your approval to test for current assignments. You can also rehearse recall on the NM2GI practice test site, and compare the broader career picture in Is the NM2GI Certification Worth It? Complete ROI Analysis 2026.