About NM51GI Exam Prep
An independent practice platform for the National Master 500/1600 GL and Inland (NM51GI) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the NM51GI exam
The National Master 500/1600 GL and Inland (NM51GI) exam is organized into 6 knowledge domains. Here is what it covers:
- Rules of the Road: Inland and International (Q100); Inland-only Q300 is the applicable restricted-route alternative
- Deck General (Q320)
- Deck Safety (Q321)
- Navigation General: Great Lakes and Inland (Q322)
- Navigation Problems: Chart Plot (Q323)
- Great Lakes Topics (Q324), Great Lakes-and-Inland route only
Every practice question on this site is organized across these 6 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.