1. Rules of the Road: Inland and International (Q100); Inland-only Q300 is the applicable restricted-route alternative
Key exam domainIdentify weak areas and improve with focused review.
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Free NM51GI Practice Test
Pass the National Master 500/1600 GL and Inland (NM51GI) exam with confidence.
Start with a free NM51GI practice test and build exam-ready confidence for the National Master 500/1600 GL and Inland (NM51GI) exam.
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Practice the NM51GI exam by domain
2. Deck General (Q320)
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing3. Deck Safety (Q321)
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing4. Navigation General: Great Lakes and Inland (Q322)
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing5. Navigation Problems: Chart Plot (Q323)
Key exam domainIdentify weak areas and improve with focused review.
Start Practicing6. Great Lakes Topics (Q324), Great Lakes-and-Inland route only
Key exam domainIdentify weak areas and improve with focused review.
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Frequently asked questions
Straight answers about the NM51GI exam, the questions, pricing, the free trial, and how this fits your prep.
The NM51GI exam spans 6 domains - 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), and Great Lakes Topics (Q324), Great Lakes-and-Inland route only. Every practice question maps to one of them, so you train on exactly what's tested.
No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the NM51GI exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.
No. NM51GI Exam Prep is an independent study resource for National Master 500/1600 GL and Inland (NM51GI). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.
Every paid plan unlocks the full bank of 1,000+ practice questions covering all 6 NM51GI domains - 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), and Great Lakes Topics (Q324), Great Lakes-and-Inland route only. You can practice the whole bank, filter by domain, or run a timed, domain-balanced exam simulation.
Yes - the bank is maintained against the current exam outline, and questions are revised when the exam changes.
No honest practice platform can guarantee a pass. What realistic practice does is show you - before exam day - exactly which domains are weak, and give you the repetitions to fix them. That's the difference between hoping you're ready and knowing where you stand.
Yes. You get 10 free sample questions with instant feedback - no credit card and no account required.
The free sample shows you the question quality. Paid plans unlock the full 1,000+ question bank, exam-style practice modes, mistake review, and - on Fast Track and Pass Confidence - progress analytics that show your readiness by domain.
No. Every plan is a single one-time payment for a fixed access window - 48 hours, 7 days, or 6 weeks. There is no auto-renewal and no recurring billing.
Match it to your exam date: Final Review (2 days) for an exam in the next day or two, Fast Track (7 days) for an exam this week, Pass Confidence (6 weeks) for a structured run-up.
For most countries, the price you see is exactly what you pay - tax is already included. Where local law requires it to be added separately, it's shown clearly at checkout before you pay, so there are never any surprise fees.
Access is instant after payment and runs for your plan's full window from that moment. When the window ends, your local progress stays on your device - you can buy another window any time and pick up where you left off.
Yes - the whole platform is mobile-first: practice, mistake review, and analytics all work on any phone, tablet, or laptop with a browser. Nothing to install.
Every answer feeds your per-domain accuracy, readiness score, and weak-area list. Instead of re-reading everything, you drill the domains that are actually costing you points - that's what moves a score in days, not months.
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Make sure you're signed in with the same email you used at checkout - access activates within a minute of payment. If it still doesn't appear, email us from the contact link in the footer and it'll be sorted out.
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Trusted by NM51GI candidates
Real feedback from NM51GI candidates on Reddit.
"almost didnt study the chart plot section cause i figured id wing it. bad idea, that stuff is picky. ran thru a bunch of practice problems on this site and it finally clicked. passed q323 no issues."
"honestly wasnt sure i needed a prep course for the rules of the road but my buddy said just try nm51giexam.com. the mistake review thing after each quiz was what actually helped, kept missing the same inland vs international stuff till i saw the pattern."
"procrastinated on great lakes topics forever, ice navigation and the meteorology stuff just felt like too much to memorize. found a practice set that broke it down piece by piece and i recieved my results back way calmer than i expected. relief more than anything."