- What "Passing" Means for the NM1N Route
- Why There Is No Single Universal Score Here
- The Five Modules You Are Scored Across
- Module-by-Module: Where Candidates Lose Points
- Chart Plot Precision: The Q163 Factor
- How Your Route Changes Which Modules Count
- Sequencing Your Preparation Around the Modules
- Approval to Test and What Happens After a Miss
- Frequently Asked Questions
- NM1N is National Master 100 NC, issued through the United States Coast Guard National Maritime Center.
- The original full exam draws on five modules: Q100, Q160, Q161, Q162, and Q163.
- Official percentage weights are not published here, so treat each module as a standalone hurdle.
- Q165 belongs to the separate OUPV-to-Master raise-of-grade route and is not part of the original five.
What "Passing" Means for the NM1N Route
Candidates searching for the NM1N passing score usually expect one clean number, the way a multiple-choice certification might print "700 out of 1000." The National Master 100 NC credential does not work that way, and understanding why will save you from preparing for the wrong target.
NM1N here refers to the National Master 100 NC: a Master license for near coastal waters on vessels of less than 100 gross register tons, administered by the United States Coast Guard National Maritime Center (NMC). The examination is built from published modules, each covering a defined body of mariner knowledge. Passing the credential means clearing every module assigned to your route, not accumulating a blended percentage across them.
If you are still orienting yourself on the credential itself, the overview at What Is NM1N? covers the basics, and NM1N Requirements 2026: Eligibility, Prerequisites & How to Qualify explains the sea-service and documentation side that precedes any exam sitting.
Why There Is No Single Universal Score Here
Several things make a single "passing score" the wrong mental model for this exam:
- Module-based structure. The exam is delivered as discrete modules (Q100, Q160, Q161, Q162, Q163), each focused on its own subject area.
- No published percentage weights. Official weighting across the modules is not published in the sources used for this article, so any claim like "Navigation is worth 30 percent" would be invented. The preparation groups below are unweighted.
- Route-dependent module lists. Not every candidate sits the same set. An increase-in-scope candidate, for instance, follows a different published pattern than someone taking the original full exam.
- Approval-driven testing. The NMC issues individual approval to test, and that approval defines what you are actually required to sit.
The practical consequence: do not budget your study time by hoping a strong module will cover for a weak one. Plan to be competent in every module on your route. For a deeper look at what the data does and does not tell us about outcomes, see NM1N Pass Rate 2026: What the Data Shows.
The Five Modules You Are Scored Across
The original full exam for the Master Near Coastal less-than-100-GRT credential is built from five modules. Here is how they map to the five preparation domains on this site:
| Module | Domain Name | Core Focus |
|---|---|---|
| Q100 | Rules of the Road: International and Inland | Watchkeeping, COLREGS, Inland Navigational Rules |
| Q160 | Deck General | Seamanship, vessel handling, firefighting, lifesaving, communications |
| Q161 | Deck Safety | Stability, construction, damage control, emergency procedures |
| Q162 | Navigation General: Near Coastal | Piloting, compasses, aids to navigation, meteorology, tides |
| Q163 | Navigation Problems: Chart Plot | Chart-based position determination and plotting problems |
A frequent mistake is carrying over structure from larger-vessel exams. The older split "Deck General Part I / Part II" and separate "Stability Problems" headings belong to a different larger-vessel module pattern and are not the NM1N structure. For this credential, stability topics live inside Q161. A full walkthrough of each content area is in NM1N Exam Domains 2026: Complete Guide to All 5 Content Areas.
Module-by-Module: Where Candidates Lose Points
Since each module must be cleared on its own terms, it helps to know the published topic lists and where preparation tends to be thin.
Q100: Rules of the Road: International and Inland
This module tests whether you can apply the steering and sailing rules, lights, shapes, and signals correctly under both regimes.
- Watchkeeping responsibilities and lookout requirements
- COLREGS (international rules) application
- Inland Navigational Rules, including how they differ from the international set
- The trap: mixing up international and inland provisions when a question names only one regime
Q160: Deck General
The broadest module by topic count. Published topics span seamanship, emergency response, and shipboard operations.
- Vessel maneuvering and handling, including turn circle, pivot point, advance and transfer, and wake reduction
- Marlinspike seamanship, temporary repairs, and purchases, blocks and tackle
- Fire prevention and firefighting, including classes and chemistry of fire
- Lifesaving, abandon ship procedures, survival at sea, and rescuing survivors
- Communications, radiotelephone, signals (storm, wreck, distress, special), certificates and documents, and ship's business
- Vessel power plants and small engine operations and maintenance
Q161: Deck Safety
Safety, stability, and structural knowledge, with stability topics preserved inside this module.
- Stability, construction, and damage control
- Trim and stability concepts and principles of vessel construction
- Man overboard procedures and emergency towing
- Fire or explosion response and passenger/crew safety in emergencies
- Overlap with Q160 on abandon ship, rescue, power plants, and firefighting appliances
Q162: Navigation General: Near Coastal
The theory side of navigation, covering the knowledge that supports the plotting work in Q163.
- Piloting, dead reckoning, distance off, bearing problems, and fix or running fix concepts
- Magnetic and gyro compass principles, compass error determination and correction
- Aids to navigation, charts, navigation publications, and Notices to Mariners
- Meteorology and oceanography: weather systems, ocean currents, weather charts and reports
- Tides and tidal currents
Notice the overlap. Q160 and Q161 share several topics (abandon ship, rescue, firefighting appliances, power plants), which means focused work in one module pays dividends in the other. That overlap is one reason the unweighted approach is sensible: you are building one interlocking safety-and-seamanship knowledge base rather than five isolated silos.
Chart Plot Precision: The Q163 Factor
Q163, Navigation Problems: Chart Plot, deserves its own discussion because it behaves differently from the knowledge-recall modules. Its published topics include piloting, distance off, bearing problems, fix or running fix, chart navigation, dead reckoning, electronic navigation, instruments and accessories, aids to navigation, and charts, navigation publications, and Notices to Mariners.
Where a recall question rewards knowing a fact, a chart-plot problem rewards a clean, accurate process. A small error early in a plot (a misread scale, a wrong variation applied, a transposed bearing) carries through every later step and can make the final answer wrong even when your method was sound. That is why candidates who feel comfortable with the theory in Q162 can still struggle in Q163: the skill being tested is execution under care, not recall.
To judge how demanding the navigation modules are relative to the rest, read How Hard Is the NM1N Exam? Complete Difficulty Guide 2026.
How Your Route Changes Which Modules Count
One of the most important points for anyone asking about a passing score is that the module list depends on how you are qualifying. The sources describe distinct pathways, and they must not be added together.
| Pathway | Published Module Set | Notes |
|---|---|---|
| Original full exam, Master Near Coastal less than 100 GRT | Q100, Q160, Q161, Q162, Q163 | The five-module structure used throughout this site |
| OUPV-to-Master Near Coastal less than 100 raise of grade | Separate module set including Q165 (Navigation and Deck General/Safety) | Q165 is not part of the original five; do not add it |
| Increase in scope, Great Lakes/Inland to Near Coastal | Q160 + Q162, plus Q100 where a COLREGS limitation applies | A narrower published set than the full exam |
Do not sum these pathways into one super-list. A candidate preparing for an increase in scope does not need to prepare for Q161 or Q163 on that route as described, while a candidate on the original full exam does. Conversely, someone pursuing a raise of grade from OUPV should look at the separate published module page rather than assuming the five-module pattern applies. Always confirm against the current NMC pages and your own approval.
Key Takeaway
Before you spend a single hour studying, confirm which modules your approval to test actually lists. Preparing for the wrong pathway wastes time, and mixing pathway lists produces a study plan that does not match any real exam.
Sequencing Your Preparation Around the Modules
Because no module can be skipped on the original full exam, a sensible sequence builds from the knowledge that supports other modules toward the precision-heavy one. This is a suggested order, not a mandated one, and the time spans should be adjusted to your sea-service background and available hours.
Q100 Rules of the Road
- Learn international and inland rules side by side so differences stay distinct
- Drill lights, shapes, and sound signals until recognition is instant
- Rules knowledge also sharpens judgment for several Deck General collision topics
Q160 Deck General and Q161 Deck Safety
- Study the overlapping topics together: abandon ship, rescue, firefighting, power plants
- Then separate out Q161 specifics: stability, trim, construction, damage control, emergency towing
- Work the vessel handling concepts: turn circle, pivot point, advance and transfer
Q162 Navigation General
- Cover compasses, error and correction, aids to navigation, and publications
- Add meteorology, ocean currents, tides, and tidal currents
- This theory feeds directly into the plotting work that follows
Q163 Chart Plot
- Practice full plots daily using a fixed, repeatable routine
- Mix in fix, running fix, distance off, and bearing problems
- Finish with timed mixed review across all five modules
The reasoning behind this order: the rules and safety modules are heavily recall-based and benefit from early repetition, while chart plotting rewards deliberate skill-building closest to test day when your compass-correction and scale-reading habits are freshest. For a fuller plan and resources, see NM1N Study Guide 2026: How to Pass on Your First Attempt, and use the NM1N practice tests to check each module as you finish it.
Approval to Test and What Happens After a Miss
The NMC process runs through individual approval. Your approval to test determines the modules you sit, and the specifics of scheduling, any fees, and any retest conditions are set by the NMC and the testing arrangements tied to your application. This article does not state a universal exam fee or a universal timer, because the sources do not support one and inventing them would mislead you.
What you can reasonably do is this:
- Read your approval carefully. It lists the modules you are authorized to take.
- Check the current NMC module pages. The original full exam is described on the NMC's Master Less Than 100 GRT module page (Q100, Q161 and related), with the companion page covering Q162/Q165 for the raise-of-grade route.
- Treat each module as independent. If a single module is the problem area, concentrate your remediation there rather than restudying everything evenly.
- Confirm retest rules directly with the NMC. Waiting periods and conditions are administrative details to verify at the source.
Cost planning is a separate question from scoring, and NM1N Certification Cost 2026: Complete Pricing Breakdown addresses the budgeting side. For timing questions, see NM1N Exam Dates 2026: Testing Windows, Deadlines & Scheduling, and for a compact refresher the night before, the NM1N Cheat Sheet 2026: One-Page Review of Must-Know Facts is a handy companion.
Frequently Asked Questions
The published sources used here do not present a single universal cut score or percentage weights. The exam is delivered as modules (Q100, Q160, Q161, Q162, Q163), and your approval to test defines which ones you must clear. Plan to be competent in every module on your route rather than aiming for a blended average.
The original Master Near Coastal less-than-100-GRT full exam uses Q100 (Rules of the Road), Q160 (Deck General), Q161 (Deck Safety), Q162 (Navigation General: Near Coastal), and Q163 (Navigation Problems: Chart Plot). Q165 is a separate module for the OUPV-to-Master raise-of-grade route and is not part of these five.
No. The module set depends on your pathway. An increase in scope from Great Lakes or Inland to Near Coastal follows a published pattern of Q160 and Q162, plus Q100 where a COLREGS limitation applies. Always confirm against your individual approval to test and the current NMC module pages.
Stability topics are preserved within Q161, Deck Safety, alongside trim, vessel construction, and damage control. The older separate "Stability Problems" heading belongs to a different larger-vessel module pattern and is not the NM1N domain structure.
Since there is no published blended passing percentage to benchmark against, aim for consistent, comfortable performance in each module individually, with special attention to accuracy on chart plots. Use the NM1N practice test site to track module-by-module results, and read this passing score guide alongside the pass rate analysis to keep expectations grounded.
In short, the passing question for National Master 100 NC is less about hitting one magic number and more about clearing each assigned module on your pathway. Confirm your approval to test, know exactly which modules apply to you, and build competence across rules, seamanship, safety, theory navigation, and precise chart work. For the bigger picture on whether the credential suits your goals, explore Is the NM1N Certification Worth It? Complete ROI Analysis 2026 and NM1N Jobs.