Pass your USCG 100-Ton Master upgrade exam. Adaptive practice covering Rules of the Road, deck general safety, navigation general, and vessel stability — every question grounded in USCG Nav Rules, 46 CFR, NOAA Coast Pilot, and Bowditch.
This is the whole difference. Get one wrong and you won't just see the answer — you'll meet the tutor.
Loading sample questions…
Every question targets the topic where you're weakest — weighted by blueprint share, your ability, and recency. The hours you put in actually move the needle.
Wrong answers summon a coach that asks "what made you pick B?" and walks you to the reasoning over a few turns — not a one-line answer key you forget by the next question.
Talk through the operational parts of 100T Master prep out loud — the kind no flashcard app can simulate. Builds the recall you need when the test isn't multiple choice.
Sourced from primary federal regulations and study guides — re-ingested on a schedule, never loosely paraphrased.
The USCG 100-Ton Master license is the working captain’s next credential after OUPV. It opens commercial work on inspected passenger vessels: small ferries, dinner cruises, dive charters, and near-coastal sightseeing operations under 100 gross tons.
The USCG National Maritime Center administers five modules for the Master 100GRT upgrade:
Stability is where most OUPV-to-Master candidates struggle. The exam asks you to reason about metacentric height, righting arm, trim, and load planning — concepts you can pass OUPV without touching. The construction & stability module is also where the NMC’s question pool draws the most heavily on 46 CFR Subchapter T, which OUPV barely tests.
Built for working captains stepping up to command. Same engine as our OUPV product; the Master content is independently sourced so your practice rate isn’t capped by what you’ve already seen on the Six-Pack side.
Every other 100T Master app is the same rectangle of question, four buttons, one big "Next." It works — and it's genuinely uninspiring.
Pay once and keep access until you pass. Subscribe only if you're studying across multiple certifications. Cancel in one tap — never buried.
Full 100T Master access until you pass.
Useful if you're prepping for more than one credential. Cancel anytime.
No app can guarantee a pass — anyone who promises that is lying to you. What we can do is target your weak topics, teach the reasoning behind every miss, and give you an honest readiness signal before you sit the exam. Most candidates who reach "ready" on our diagnostic pass on the first try.
Yes. Questions are generated and checked against the current 100T Master source documents, then re-ingested on a schedule when those documents change. We don't ship loosely paraphrased material.
If PassFirst isn't right for you, email us within 14 days for a full refund — no rage-bait "are you sure?" flow, no hoops. We'd rather you trust us than feel trapped.
The question pool tracks the current federal source documents. When the regulations update, the affected questions are regenerated and re-verified — and your access carries through it.
This is a federal credential, so the question pool is scoped to exactly the federal knowledge sections you'll be tested on — no state variations to worry about.
Try the first five questions free. See how PassFirst feels before you commit a dollar.
Start free practice →