A common complaint is that the official USCG/NMC sample examinations just sit in massive, un-searchable PDFs on the National Maritime Center website, while many existing online prep tools look like they haven’t been updated in years.
To try and fix this, I parsed the public domain NMC sample question banks and built a modern, responsive practice testing tool: wheelhouseprep.com
How the logic is structured:
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Module and Credential Alignment: Organized the questions exactly by credential and specific module, from Six-Pack and 100-ton up to Chief Engineer.
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Exam Simulation: Built a testing mode that mimics real exam scoring rules (90% required to pass Rules of the Road, 70% for other modules) and includes a timer.
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Smart Drills: It tracks seen versus unseen questions so you aren’t stuck repeating the same static pool.
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Frictionless: There is no account registration, email harvest, or login required to test the free modules.
Full Disclosure: I am a professional data consultant, not a mariner. I have implemented a paid tier for the complete, unrestricted question bank to cover the data hosting and building infrastructure, but the free tier consists of actual, full-length modules rather than a 5-question teaser.
Because I haven’t sat in the hot seat for these modules myself, I would highly appreciate feedback from this community, especially from instructors or mariners who are actively studying or recently tested.
If you have a few minutes to run through a free module for your credential, please let me know if the grading logic feels accurate, if the formatting holds up, or if anything looks out of place.
What’s the benefit of yours vs the other license exam study programs? Just that it’s online?
As far as I remember about 5yrs ago the USCG stopped updating their question banks online, so at best your questions is just that, 5yrs old.
Thanks for your question!
On the questions being old: from what I can find, the Coast Guard didn’t actually stop. In 2016 they moved from publishing a bank of individual questions to publishing official sample exams plus topic outlines (required by the 2015 Authorization Act), and they refresh those roughly once a year. Some of the current ones carry 2025 dates, though not every module changes every year. They’re on the NMC page if you want to look: https://www.dco.uscg.mil/nmc/examinations/ > Sample examinations > Refreshed August 2025.
The site is built straight from those official samples, which as far as I understand is the same source the other prep programs use, since the live exam questions aren’t public for anyone.
As for what’s actually different, it isn’t really “it’s online,” since most of them are. A few things I tried to do better:
- A genuinely usable free tier for every credential, no signup, so you can practice and decide before paying anything.
- It’s organised by your specific exam (OUPV, Master 100, QMED, and so on) rather than one big undifferentiated pile you have to wade through.
- Most questions have a plain-English explanation of why the answer is right, with the rule it comes from, so you’re learning the reasoning rather than just memorising.
- It scores you module by module at the real pass marks (90% on Rules of the Road, 70% on the rest) and has a full timed exam simulation, so it feels like the real sitting.
- One-time price for lifetime access to every credential, no subscription.
That’s what I was aiming for anyway. The free tests are right there to try, and if you’ve sat the exam recently and something looks off, I’d genuinely value the feedback.
Placing outdated questions in perspective.
46 USC § 7510. Examinations for merchant mariner credentials
(b) EXCEPTION FOR CERTAIN QUESTIONS. — Notwithstanding subsection (a), the Secretary may, for the purpose of preparation by the general public for examinations required for merchant mariner credentials, release an examination question and answer that the Secretary has retired or is not presently on or part of an examination, or that the Secretary determines is appropriate for release.
The above statement seems to indicate that an old database of previous questions may still be relevant.
Can you remember when USCG professional assessments included area and steel weight problems?
What is the area of a circle with a radius of 21 feet after a sector of 120" has been removed?
A. 115.45 ft
B. 230.91 ft
C. 461.81 ft
D. 923.63 ft
Determine the weight of a rectangular piece of 20.4 lb. steel measuring 4 feet by 6 feet.
A. 204.0 lbs.
B. 489.6 lbs.
C. 734.4 lbs.
D. 979.2 lbs.
This should take us back to knowing the subject (topics) vice focussing on learning the answer to a specific test question.
The USCG questions do nothing more than reinforce our knowledge of the topic and the various variations that maybe included.
