- What NM1N Training Actually Covers
- The Five Modules You Train For
- Rules of the Road Training (Q100)
- Deck General Training (Q160)
- Deck Safety Training (Q161)
- Navigation General Training (Q162)
- Chart Plot Training (Q163)
- Matching Training to Your Route
- Sequencing the Modules
- Practice and Question Format
- Where the Credential Gets Used
- Frequently Asked Questions
- NM1N is National Master 100 NC, administered through the United States Coast Guard National Maritime Center.
- The original full exam draws on five modules: Q100, Q160, Q161, Q162 and Q163.
- Q165 belongs to the separate OUPV-to-Master Near Coastal raise-of-grade route, not the original five.
- Official percentage weights are not published, so train every module rather than betting on a favorite.
What NM1N Training Actually Covers
National Master 100 NC (NM1N) is a U.S. Coast Guard deck credential: Master Near Coastal on vessels of less than 100 gross register tons. The governing body is the United States Coast Guard National Maritime Center (NMC), and "training" for this credential means two things that are easy to confuse. One is the preparation you do to pass the NMC examination modules. The other is the experience and approvals that sit around the exam, which are covered in our NM1N requirements guide.
This article focuses on the first meaning: what you actually need to learn, module by module, and how to sequence it. If you are still sorting out the terminology, start with What Is NM1N? and come back.
The Five Modules You Train For
The original full Master Near Coastal under 100 GRT exam uses five modules. They are not weighted by any official percentage published in the sources we rely on, so the groupings below are unweighted preparation groups. For a deeper domain-by-domain breakdown, see the NM1N exam domains guide.
| Module | Domain | Training Character |
|---|---|---|
| Q100 | Rules of the Road: International and Inland | Rule recall and scenario application |
| Q160 | Deck General | Broad seamanship, handling and emergency knowledge |
| Q161 | Deck Safety | Stability, construction, damage control, firefighting |
| Q162 | Navigation General: Near Coastal | Piloting, compasses, weather, tides, publications |
| Q163 | Navigation Problems: Chart Plot | Applied plotting on charts |
One important boundary: the old split "Deck General Part I / Part II" and separate "Stability Problems" headings belong to a different, larger-vessel module pattern. They are not the structure of NM1N, so ignore study materials organized that way. Stability for NM1N lives inside Q161.
Rules of the Road Training (Q100)
Domain 1: Rules of the Road: International and Inland (Q100)
This module covers watchkeeping, the COLREGS (International) and the Inland Navigational Rules. Candidates must be fluent in both rule sets and know where they diverge.
- Watchkeeping responsibilities and the lookout requirement
- COLREGS: steering and sailing rules, lights, shapes and sound signals
- Inland Rules: the same families of rules with their own wording and signals
- Applying right-of-way logic to a described situation
The most productive training approach for Q100 is side-by-side study. Build a two-column comparison of International versus Inland for each rule family, then drill the differences until you can state them without hesitation. Memorizing one set and assuming the other is "about the same" is the classic way candidates lose points here.
Deck General Training (Q160)
Q160 is the widest module by sheer topic count, which is why it rewards organized study. The published catalog spans seamanship, marlinspike seamanship, purchases, blocks and tackle, temporary repairs, vessel maneuvering and handling, communications, small engine operations, lifesaving, firefighting and emergency procedures.
Domain 2: Deck General (Q160)
Practical seamanship and operations knowledge that a master is expected to carry in their head.
- Vessel maneuvering: turn circle, pivot point, advance and transfer, and wake reduction
- Marlinspike seamanship and purchases, blocks and tackle
- Collision response, temporary repairs and emergency procedures
- Communications, including radiotelephone procedures
- Certificates and documents required, and ship's business
- Fire chemistry, firefighting appliances, lifesaving and survival at sea
- Signals: storm, wreck, distress and special
- Vessel power plants and small engine operation and maintenance
Because Q160 is broad, group it into clusters: handling and maneuvering, rope and rigging work, emergency response, documentation, and machinery. Study one cluster per session and test yourself at the end of each. This keeps a large topic list from turning into a blur.
Deck Safety Training (Q161)
Q161 is where stability, vessel construction and damage control come together with fire and emergency material. Several topics overlap with Q160 by name (abandon ship procedures, firefighting appliances, vessel power plants), but Q161 approaches them from the safety and vessel-integrity side.
Domain 3: Deck Safety (Q161)
Safety, construction and stability knowledge applied to a vessel under 100 GRT.
- Trim and stability, and what changes them
- Principles of vessel construction
- Damage control and passenger/crew safety in emergencies
- Fire or explosion response and firefighting appliances
- Abandon ship procedures and man overboard procedures
- Rescuing survivors from a ship or aircraft in distress
- Emergency towing
Navigation General Training (Q162)
Q162 is the conceptual navigation module. It tests whether you understand the tools and the reasoning, while Q163 tests whether you can actually execute plots. Topics include piloting, dead reckoning, distance off, bearing problems, fix or running fix, aids to navigation, charts and navigation publications, Notices to Mariners, compass principles and error, terrestrial observation, meteorology, oceanography and tides.
Domain 4: Navigation General: Near Coastal (Q162)
The knowledge base behind safe near-coastal navigation.
- Magnetic and gyro compass principles, and determining and applying compass error
- Piloting, distance off, bearing problems, and fix versus running fix
- Aids to navigation, chart symbology and Notices to Mariners
- Instruments and accessories used in chart work
- Weather systems, weather charts and reports, ocean currents
- Tides and tidal currents
Compass error is a favorite trouble spot because it requires careful sign handling. Practice converting between true, magnetic and compass courses until the process is mechanical, since small sign mistakes produce wrong answers that look plausible.
Chart Plot Training (Q163)
Q163 is the most skills-based module. It covers navigation and position determination, piloting, distance off, bearing problems, fix or running fix, chart navigation, dead reckoning, electronic navigation, instruments and accessories, aids to navigation, and charts, publications and Notices to Mariners.
Domain 5: Navigation Problems: Chart Plot (Q163)
Applied plotting where accuracy and method both matter.
- Dead reckoning plots with course, speed and time
- Fixes and running fixes from bearings and distances
- Distance-off and bearing problems on the chart
- Using parallel rulers, dividers and plotting instruments correctly
- Reading chart information and applying published corrections
Key Takeaway
You cannot learn chart plotting by reading about it. Work real plotting problems with physical tools, check each answer against the method, and repeat until your plots are clean and your arithmetic is reliable.
Matching Training to Your Route
This is where many candidates go wrong: assuming every NM1N candidate sits the same five modules. The published guidance is route-aware, and you should not add together alternate upgrade pathways or assume one universal exam applies to everyone.
| Pathway | Modules Referenced |
|---|---|
| Original Master Near Coastal less than 100 GRT (full exam) | Q100, Q160, Q161, Q162, Q163 |
| OUPV to Master Near Coastal less than 100 raise of grade | Q162 and Q165 (Navigation and Deck General/Safety) |
| Increase in scope, Great Lakes or Inland to Near Coastal | Q160 + Q162, plus Q100 where a COLREGS limitation applies |
Q165 is a separate raise-of-grade module and is not one of the original five. If you are on a raise-of-grade or increase-in-scope route, your training load is narrower than the full exam, but you should confirm exactly which modules your approval assigns you. For fees, scheduling and what to expect procedurally, see the NM1N certification cost breakdown and the NM1N exam dates guide; this article deliberately avoids stating universal fees or timers because they are not fixed across routes.
Sequencing the Modules
Generic study advice matters less than ordering the modules so that earlier material supports later material. Here is a sequence tied to how the NM1N modules depend on each other.
Q162 foundations, then Q163 plotting
- Learn compass error, piloting and chart symbology first
- Begin plotting drills immediately so concepts become procedure
Q100 Rules of the Road
- Build the International versus Inland comparison tables
- Drill lights, shapes, sound signals and right-of-way scenarios
Q160 Deck General and Q161 Deck Safety
- Work Q160 in clusters: handling, rigging, emergencies, documents, machinery
- Give trim and stability separate sessions inside Q161
Mixed review
- Revisit your weakest module first
- Keep plotting practice running so the skill stays sharp
Navigation goes first because Q162 concepts feed directly into Q163 execution, and plotting skill decays quickly without repetition. For a broader plan, the NM1N study guide expands on pacing, and the NM1N cheat sheet is useful for last-pass review of must-know facts.
Practice and Question Format
The knowledge modules (Q100, Q160, Q161, Q162) are built around objective questions on the topics listed above, while Q163 requires you to work problems on a chart. Because official percentage weights are not published in the sources used here, we recommend not trimming any module based on a guess about its importance.
Effective practice mixes three activities:
- Topic-targeted questions after each study cluster, so errors point to a specific topic from the catalog.
- Plotting sessions with real instruments, timed once you are accurate.
- Rule-comparison recall for Q100, saying out loud where International and Inland differ.
You can run topic-based drills on our NM1N practice test site, and use the results to decide which cluster to revisit. If you want a realistic read on how demanding the material is, see How Hard Is the NM1N Exam? and the NM1N passing score guide. For what data exists on outcomes, read the NM1N pass rate analysis; we do not quote a pass-rate figure here because none is published in our source material.
Where the Credential Gets Used
A Master Near Coastal under 100 GRT credential qualifies the holder to command smaller vessels operating near the coast. In practice that points toward operators of small passenger vessels, charter and sightseeing boats, towing and assist work, fishing-related support, and similar near-coastal operations. We do not cite salary numbers because none are given in the verified facts for this credential; for the earnings discussion and career angles, see the NM1N salary guide, NM1N jobs and the NM1N ROI analysis.
Frequently Asked Questions
It prepares you for the U.S. Coast Guard NMC examination modules for Master Near Coastal under 100 GRT. The original full exam uses Q100, Q160, Q161, Q162 and Q163, and your own route determines exactly which modules you must sit.
No. Q165 (Navigation and Deck General/Safety) is the separate OUPV-to-Master Near Coastal under 100 raise-of-grade module. It is not one of the original five modules.
Start with Q162 navigation concepts and move straight into Q163 plotting, since plotting depends on that foundation and needs the most repetition. Then cover Q100, followed by Q160 and Q161.
Official percentage weights are not published in the sources used here. Treat the five modules as unweighted preparation groups and give each real study time rather than guessing which carries more.
Fees and scheduling depend on your route and approval, so check the cost guide, the exam dates guide and the requirements guide, and confirm specifics with the National Maritime Center.
Solid NM1N training comes down to matching your study to your actual route, respecting how the five modules build on each other, and putting real hands-on time into chart plotting. When you are ready to test your recall, head to the NM1N practice test and start with the module you feel least sure about.