NMUGI Passing Score 2026: Exactly What You Need to Pass

What "Passing Score" Means for This Credential

Most candidates searching for the NMUGI passing score expect a single number: a percentage, a scaled score, or a cut line applied to one long test. That mental model comes from commercial certification exams, and it doesn't map cleanly onto how the United States Coast Guard National Maritime Center (NMC) structures the Mate of Unlimited Tonnage Great Lakes and Inland examination.

Here, "passing" is about completing a set of separate examination modules, each tied to a defined body of seamanship, navigation, safety, and regulatory knowledge. The candidate's job is to clear every module required for their specific route. Understanding which modules apply to you is, in practice, more important than chasing a headline percentage.

If you want the broader picture of how difficult the material is before digging into scoring mechanics, see our guide on how hard the NMUGI exam is.

What Is and Isn't Published

It is worth being direct about what this article can and cannot tell you, because passing-score pages elsewhere on the internet routinely fill the gap with guesses.

What the published guide does establish is the structure: which modules exist, which topics sit inside each, and how your route (initial issuance versus an increase of scope) determines which modules you sit. That structure is what you can plan against.

Note also that the examination guide carries an older publication date. A more recent review date on the NMC page is not a new guide edition, so don't assume the content has been rewritten simply because the page shows a recent review.

For cost and scheduling questions that are adjacent to scoring, see NMUGI certification cost and NMUGI exam dates.

Which Modules You Actually Sit

The single most useful thing you can do before worrying about a passing threshold is pin down your module list. The route determines the count.

Notice that no route ordinarily contains both Rules modules as a universal seven-module exam. The Rules content is a choice between Q100 and Q300, not an additive requirement. Candidates who assume seven modules are over-preparing in the wrong direction or misreading a study resource that lumps everything together.

Eligibility and sea-service prerequisites sit upstream of any of this; see NMUGI requirements to confirm you qualify before you plan an exam sequence.

The Rules of the Road Choice: Q100 vs. Q300

The Rules of the Road module is where your route has a lasting consequence on the credential itself, so it deserves its own section.

The practical advice: unless you have a firm reason to accept a COLREGS limitation, plan around Q100. Choosing Q300 trades a smaller body of rules content for a restriction that follows you. Inland applicants use Q100 unless they specifically request Q300.

Module-by-Module Content Map

Because the fair question behind "what's the passing score" is really "what do I have to know," here is what the published source topics say each module covers.

Q308: Deck General

This is the broadest module and the one that most resembles a mate's day-to-day professional knowledge. Source topics include seamanship, marlinspike seamanship, purchases, blocks and tackle, and watchkeeping principles, along with the Navigation Safety Regulations (33 CFR 164). It reaches deep into vessel maneuvering and handling: handling in rivers and estuaries, maneuvering in shallow water, bank and passing-ship interaction, berthing and unberthing, anchoring and mooring, dragging anchors and clearing fouled anchors, and heavy weather operations. It also covers turn circle, pivot point, advance and transfer; maneuvering characteristics of major vessel types; wake reduction; and ice operations. Cargo handling and stowage, dangerous and hazardous cargo regulations, tank vessel and fuel oil operations, maritime law, credentialing of seamen, and shipboard management round it out.

Q309: Deck Safety

Q309 groups stability, construction, and damage control with firefighting, emergency procedures, communications, and lifesaving. Source topics include principles of vessel construction, trim and stability, vessel structural members, damage control, marine engineering terms, fire classes and chemistry, firefighting systems and equipment, organization of fire drills, abandon ship procedures, man overboard procedures, emergency steering, emergency towing, rescuing survivors, storm/wreck/distress signals, and lifesaving appliance regulations and operation.

Q310: Navigation General, Great Lakes and Inland

This module combines position determination with compass work and meteorology. Topics include piloting, distance off, bearing problems, fixes and running fixes, dead reckoning, electronic navigation, aids to navigation, charts and Notices to Mariners, magnetic and gyro compass principles and error correction, terrestrial observation, weather systems and charts, tides and tidal currents, and the Navigation Safety Regulations.

Q311: Chart Plot

Q311 is the hands-on plotting module: piloting, distance off, bearing problems, fixes and running fixes, chart navigation, dead reckoning, electronic navigation, instruments and accessories, aids to navigation, and charts and publications. It overlaps conceptually with Q310 but is tested as applied plotting work.

Q312: Great Lakes Topics

Q312 is the route-specific module. It restates much of the piloting and navigation material and layers on Great Lakes-oriented maneuvering, ice operations, stability and damage control, cargo handling, and tank vessel operations. It is omitted from Inland-only routes and required when increasing from Inland to Great Lakes and Inland.

For a fuller treatment of how these areas fit together, see the complete guide to all NMUGI content areas.

Topic Groups Are Not Percentage Weights

This is the most common misreading of the NMUGI structure, so it is worth stating plainly. The six headings (Rules of the Road, Deck General, Deck Safety, Navigation General, Chart Plot, and Great Lakes Topics) are module and topic groups. They are not percentage weights. The Rules alternatives (Q100 and Q300) are grouped together as one preparation area, and Q312 is retained as a route-specific heading.

The takeaway for planning: allocate time by your honest weakness and by module breadth, not by an invented percentage table. Q308's topic list is the longest, which signals breadth, but breadth is not the same as a weight.

If pass-rate statistics are what you're really after, read what the data shows about NMUGI pass rates for a candid treatment of what is and isn't known.

Where Candidates Lose Ground: Navigation and Chart Plot

Because the exam is modular, a failed module doesn't erase the ones you cleared, but it does cost you a retake and time. Mates with strong deck backgrounds often find the navigation-heavy modules (Q310, Q311, and Q312 where applicable) less forgiving than the seamanship material, because plotting questions have one defensible answer and arithmetic or chart-reading slips are unambiguous.

Three overlap areas deserve disciplined attention because they appear across multiple modules:

• Fixes and running fixes: listed in Q310, Q311, and Q312. Practice until the construction is automatic.
• Compass error: magnetic and gyro error and correction appear in Q310, and determination of compass error appears in Q312.
• Tides and tidal currents: relevant in both Q310 and Q312, and a frequent source of careless errors.

Upgrade Routes and Added Modules

Not every candidate sits the full initial set. If you already hold an Inland credential and are increasing scope, your module list shrinks to what's genuinely new.

1. Increase from Inland to Great Lakes and Inland: Q312 is required.
2. If your existing credential has a COLREGS limitation: Q100 is additionally required, because the limitation exists precisely because Q300 was used earlier.
3. Inland-only routes: Q312 is omitted entirely.

This is why asking "what's the passing score" without specifying your route is an incomplete question. Two candidates can both be pursuing "NMUGI" and face quite different module lists. Start by confirming your route with the NMC, then work backward to the modules you need.

For a sense of why people pursue the increase, see whether the NMUGI certification is worth it and NMUGI jobs for the kinds of positions this scope supports.

Sequencing Your Preparation Around the Modules

Rather than a generic weekly template, tie your sequencing to how the modules relate. This is one illustrative ordering for a full Great Lakes and Inland route; adjust it to your own gaps.

For a fuller plan, see the NMUGI study guide, and for last-minute review use the NMUGI cheat sheet. When you want to test yourself under realistic conditions, our NMUGI practice tests let you drill each module's topics, and the main practice test site is the fastest way to find your weak spots before exam day.

Frequently Asked Questions

Before you schedule anything, confirm your exact route with the National Maritime Center, then build your preparation around the specific modules that route requires rather than around a score you can't verify.