- What "Pass Rate" Can and Cannot Tell You Here
- Why There Is No Single Number for This Credential
- How Your Route Shapes the Modules You Face
- Where Candidates Tend to Struggle, Module by Module
- Retakes, Preparation Gaps, and What Failing Really Means
- How to Read Pass-Rate Claims Critically
- A Module-Driven Preparation Sequence
- What Passing Opens Up
- Frequently Asked Questions
- The U.S. Coast Guard National Maritime Center administers this exam, and this article cites no published aggregate pass rate for it.
- Full routes contain six modules for Great Lakes and Inland, or five for Inland-only; it is never a universal seven-module exam.
- Q100 is the Rules module for Great Lakes and Inland; choosing Q300 produces a geographic COLREGS limitation.
- Q312 (Great Lakes Topics) applies only to the Great Lakes route and is omitted from Inland-only routes.
What "Pass Rate" Can and Cannot Tell You Here
Candidates searching for a pass rate usually want one thing: reassurance. They want to know whether the National Mate Unlimited GL and Inland (NMUGI) examination is something most people clear on the first try or something that routinely sends people back for a second sitting. That is a reasonable question, but the honest answer starts with a limitation. The governing body for this credential, the United States Coast Guard National Maritime Center (NMC), publishes examination guides and module listings, and the material this article draws on does not include a published aggregate pass percentage for the Mate of Unlimited Tonnage Great Lakes and Inland (NMC code GLI02) examination.
Rather than invent a figure, this article does something more useful: it explains what actually determines whether a candidate passes, how the exam is structured into modules, which modules carry the heaviest content burden, and how to evaluate any pass-rate claim you encounter elsewhere. If you want the broader picture of difficulty first, the companion piece How Hard Is the NMUGI Exam? Complete Difficulty Guide 2026 covers the subject from the angle of perceived effort rather than outcomes.
Why There Is No Single Number for This Credential
Even if a pass percentage were published, a single number would obscure more than it reveals. The NMUGI examination is not one monolithic test. It is a set of separate modules, each identified by a Q-code, and a candidate's route determines which modules appear in their battery. A blended percentage across all candidates would mix people sitting different combinations of modules, people retaking a single failed module, and people upgrading from an existing credential. Those populations behave very differently.
Consider three candidates who might all be counted in a hypothetical headline figure:
- A deckhand-to-mate candidate sitting the full initial Great Lakes and Inland battery for the first time.
- An inland-only candidate sitting a smaller battery with no Great Lakes content at all.
- A mariner with an existing Inland credential increasing the scope to Great Lakes and Inland, who may need only the Great Lakes module and, in some cases, the international and inland Rules module.
Lumping these together tells you almost nothing about your own odds. What matters is the module set you personally face and how well your preparation matches the published topic lists for those modules. Our guide to NMUGI passing score requirements walks through the scoring side of this question.
How Your Route Shapes the Modules You Face
Understanding your route is the single most practical thing you can do before worrying about statistics. The published examination guide groups the content under six headings, and those headings are module and topic groups, not percentage weights. Nothing in the source material assigns a percentage of questions to any heading, so treat any claimed weighting with caution.
| Route | Rules Module | Great Lakes Module (Q312) | Typical Module Count |
|---|---|---|---|
| Full initial, Great Lakes and Inland | Q100 (International and Inland) | Included | Six |
| Full initial, Inland only | Q100, or Q300 on request | Omitted | Five |
| Increase from Inland to Great Lakes and Inland | Q100 additionally required if the existing credential has a COLREGS limitation | Required | Depends on existing credential |
A few points deserve emphasis. First, the Rules area is presented as a single preparation area that retains both Q100 and Q300 content, but a candidate does not sit both as a universal requirement. The published guide specifies Q100 for Great Lakes and Inland. Inland applicants use Q100 unless they request Q300, and requesting Q300 produces a geographic COLREGS limitation on the credential. Second, the route-specific Q312 module exists only for the Great Lakes pathway. Third, because of all this, full initial routes ordinarily contain six modules for Great Lakes and Inland or five for Inland, not seven.
If you are still working out which route fits you, the article on NMUGI requirements, eligibility, and prerequisites is the right starting point.
Where Candidates Tend to Struggle, Module by Module
Because no official per-module failure statistics are cited here, the following is a qualitative reading of the published topic lists, not a data claim. It identifies where the sheer breadth or technical density of a module creates risk. The topic lists below come straight from the published guide.
Rules of the Road: Q100 and Q300
This module covers watchkeeping, the International Regulations (COLREGS), and the Inland Navigational Rules. Q300 is the Inland-only alternative covering watchkeeping and the Inland rules.
- Candidates must keep the international and inland rule sets distinct, since similar situations can have different required actions.
- Choosing Q300 narrows your credential with a geographic COLREGS limitation, so the module choice has career consequences beyond the exam.
Deck General (Q308)
This is the broadest module in the battery by topic count. It spans seamanship, marlinspike work, purchases, blocks and tackle, watchkeeping principles, Navigation Safety Regulations (33 CFR 164), vessel maneuvering and handling, cargo handling and stowage, maritime law, and shipboard management.
- Maneuvering topics include turn circle, pivot point, advance and transfer, interaction with banks and passing ships, berthing, anchoring, and heavy weather.
- Cargo topics include stowage and security, loading and discharging, dangerous and hazardous cargo regulations, and tank vessel and fuel oil operations.
- Management topics include credentialing of seamen, hot work, safety, ship's business, and required certificates and documents.
Deck Safety (Q309)
Stability, construction, damage control, vessel power plants, firefighting, emergency procedures, communications and signals, and lifesaving.
- Expect firefighting chemistry and classes of fire alongside systems and equipment regulations.
- Emergency procedures range from abandon ship and man overboard to emergency steering and towing.
- Lifesaving covers both the regulations for appliances and how they are operated.
Navigation General (Q310)
Piloting, distance off, bearing problems, fixes and running fixes, dead reckoning, electronic navigation, aids to navigation, compasses (magnetic and gyro), meteorology, and tides and tidal currents.
- Compass error determination is a recurring theme, covering both gyro and magnetic compasses.
- Weather topics include weather systems, charts and reports, and oceanography.
Chart Plot (Q311)
This module is practical and procedural: piloting, distance off, bearing problems, fix or running fix, chart navigation, dead reckoning, electronic navigation, instruments, aids to navigation, and chart publications and Notices to Mariners.
- Because it is a plotting exercise, accuracy and method matter more than recall.
- Errors compound: a misplotted first fix corrupts everything after it.
Great Lakes Topics (Q312)
Route-specific. It blends navigation, maneuvering, stability and construction, and cargo topics, with Great Lakes emphasis, including ice operations and wake reduction.
- Several maneuvering and construction topics carry a published Great Lakes footnote in the NMC matrix.
- Ice navigation and heavy weather operations are distinctive to this module's flavor.
For a fuller treatment of what each content area demands, see NMUGI Exam Domains 2026: Complete Guide to All 6 Content Areas.
Retakes, Preparation Gaps, and What Failing Really Means
Because the exam is modular, failing is rarely a binary, all-or-nothing event. A candidate who struggles with one module is dealing with one gap, not a verdict on their whole preparation. That structural fact is probably more useful for planning than any headline percentage. The practical consequences are these:
- Your weakest module is the one most likely to cost you time, so identify it before exam day rather than after.
- Modules with large, scattered topic lists (Q308 and Q312 especially) punish shallow, last-minute review more than narrow modules do.
- Plotting modules reward repetition of method; knowledge-recall modules reward breadth of coverage.
The published material in our source set does not specify retake waiting periods or fees, and this article does not assert any. For the cost side of the picture, consult NMUGI Certification Cost 2026: Complete Pricing Breakdown, and for scheduling logistics, NMUGI Exam Dates 2026: Testing Windows, Deadlines & Scheduling. Always confirm current fee and scheduling details directly with the National Maritime Center, because they can change independently of the examination guide.
How to Read Pass-Rate Claims Critically
You will encounter pass-rate claims in forums, training-provider marketing, and aggregator sites. Here is a quick set of tests to apply before you let any number shape your confidence.
Ask what population the number describes
A provider's internal success rate describes that provider's students, who self-selected into training and may differ greatly from the general candidate pool. It says nothing about the national picture.
Ask whether it is per module or per candidate
A per-module pass figure and a per-candidate "passed everything" figure are different quantities, and neither maps cleanly to your situation if you face a different module set.
Ask whether it is for this credential
Because the NMUGI acronym is shared by several unrelated credentials, a figure may describe an entirely different exam. A genuine claim about this credential will reference the Coast Guard, the Mate of Unlimited Tonnage Great Lakes and Inland scope, and the Q-code modules.
Ask for the date and source
No date and no named source means no weight. A number without provenance is decoration.
Key Takeaway
Replace the question "what percentage pass?" with "am I ready for each module on my specific route?" The second question is answerable with practice questions and the published topic lists; the first is not answerable from the sources available for this credential.
A Module-Driven Preparation Sequence
Generic study advice is plentiful, so this section sticks to sequencing tied to the actual module content. The logic is to front-load the broadest, most scattered material and leave the procedural modules for repetition closer to the exam. For the fuller walkthrough, see the NMUGI Study Guide 2026: How to Pass on Your First Attempt.
Deck General (Q308)
- Start here because it has the widest topic spread: seamanship, maneuvering, cargo, law, and management.
- Group maneuvering topics together (turn circle, pivot point, interaction, berthing, anchoring) so they reinforce each other.
Deck Safety (Q309)
- Separate fire, emergency procedures, and lifesaving into distinct review blocks.
- Tie stability and damage control to the construction terminology you met in Q308 and, for the Great Lakes route, Q312.
Navigation General (Q310) and Chart Plot (Q311)
- Study Q310 and Q311 together since they share piloting, fixes, and dead reckoning content.
- Practice plotting repeatedly; method errors are the usual culprit.
Rules (Q100 or Q300) and Q312 if applicable
- Review the Rules module that matches your route, keeping international and inland provisions clearly separated.
- Great Lakes candidates close with Q312, concentrating on ice operations, wake reduction, and the footnoted topics.
Adjust this to your background. A mariner with years of cargo experience may compress the cargo portions of Q308 and spend more time on plotting, while a candidate fresh from a different sector may need the reverse. A condensed review companion is available in the NMUGI Cheat Sheet 2026: One-Page Review of Must-Know Facts, and you can test your retention against realistic questions on our practice test platform.
What Passing Opens Up
The credential matters because of what it permits. A mate of unlimited tonnage on the Great Lakes and inland waters is a licensed deck officer, which is the foundation for careers on Great Lakes bulk carriers, tank vessels, towing and barge operations, and inland cargo and passenger operations. The relevant employers are the vessel operators on those waters, and the credential's scope determines which of those roles you can lawfully fill. Because the examination guide does not cite earnings, this article makes no salary claims. If you are weighing whether the effort justifies the outcome, the analyses in Is the NMUGI Certification Worth It? Complete ROI Analysis 2026 and NMUGI Jobs take that question on directly, and the NMUGI Salary Guide addresses compensation separately.
For candidates still orienting themselves to the credential's identity, the explainers What Is NMUGI? and What Does NMUGI Stand For? clarify the terminology and confirm which credential this site covers.
Ultimately, the data point that matters most is not a national percentage but your own readiness, module by module. Use the published topic lists as your checklist, confirm your route and module set with the National Maritime Center, and let practice-question performance, not a borrowed statistic, tell you when you are ready to sit.
Frequently Asked Questions
The source material for this credential, drawn from the U.S. Coast Guard National Maritime Center's examination guide and module matrix, does not include a published aggregate pass percentage for the Mate of Unlimited Tonnage Great Lakes and Inland examination. Be skeptical of any specific figure presented without a named dataset, period, and source.
Full initial routes ordinarily contain six modules for Great Lakes and Inland, or five for Inland only. It is not a universal seven-module exam, because the Rules alternatives (Q100 and Q300) are not both required and Q312 applies only to the Great Lakes route.
Q100 covers Rules of the Road for both International (COLREGS) and Inland waters and is the module specified for Great Lakes and Inland. Q300 is Inland-only. Inland applicants use Q100 unless they request Q300, which results in a geographic COLREGS limitation on the credential.
Q312, Great Lakes Topics. It is omitted from Inland-only routes and required when increasing from an Inland credential to Great Lakes and Inland. It covers topics such as ice operations, wake reduction, vessel handling, stability and construction, and cargo handling with Great Lakes emphasis.
No. The headings are module and topic groupings from the published guide. The source material does not assign percentage weights to them, so any claim of exact weighting should not be relied upon. For a deeper look at the structure, see the complete domains guide.