USCG Master 100-Ton Captain License Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the USCG Master 100-Ton Captain License Vocabulary Games
4 free word games built on 20 USCG Master 100-Ton Captain License terms across 5 topics. Every game deals terms at random and shows what each term means, so you can keep playing as long as you like.
How to Play
- 1.Read the clue and type the term (3 to 6 letters).
- 2.Green: right spot. Yellow: wrong spot. Gray: not in the term.
- 3.Solve it in 6 tries, then read the explanation.
- 1.Swap two neighboring tiles to line up 3 of the same term.
- 2.Longer lines, two lines at once and chains score more.
- 3.Play until no swap can make a line.
- 1.Flip two cards. A matching pair stays face up.
- 2.Each pair you find shows what the term means.
- 3.Clear the board in as few moves as you can.
- 1.Find each listed term in the letter grid.
- 2.Drag across its letters: across, down or diagonally.
- 3.Find all five as fast as you can.
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Topics in the USCG Master 100-Ton Captain License Vocabulary Game
Rules of the Road
Deck General
Deck Safety
Navigation General
Chart Plot
Sources for these terms (15)
- 33 CFR 83.03 — General definitions (Rule 3) · Source checked 2026-11-03
- 33 CFR 83.10 — Traffic separation schemes (Rule 10) · Source checked 2026-11-03
- 33 CFR 83.21 — Definitions (Rule 21) · Source checked 2026-11-03
- 33 CFR 83.35 — Sound signals in restricted visibility (Rule 35) · Source checked 2026-11-03
- 46 CFR 175.400 — Definitions of terms used in this subchapter · Source checked 2026-11-03
- 46 CFR 176.302 — Certificates and permits · Source checked 2026-11-03
- 46 CFR 10.107 — Definitions in subchapter B · Source checked 2026-11-03
- 46 CFR 180.70 — Ring life buoys · Source checked 2026-11-03
- 46 CFR 180.71 — Lifejackets · Source checked 2026-11-03
- 46 CFR 180.64 — Emergency Position Indicating Radiobeacons (EPIRB) · Source checked 2026-11-03
- 46 CFR 180.68 — Distress flares and smoke signals · Source checked 2026-11-03
- 47 CFR 80.314 — Distress communications · Source checked 2026-11-03
- 46 CFR 69.9 — Definitions · Source checked 2026-11-03
- The American Practical Navigator (Bowditch), Volume 1, 2024 edition · Source checked 2026-11-03
- 33 CFR 167.5 Definitions (Offshore Traffic Separation Schemes) · Source checked 2026-11-04
About the USCG Master 100 Exam
The USCG Master 100-Ton Captain License exam is the knowledge-test path for Master Less Than 100 GRT credentials used for near coastal or inland passenger-vessel operations. The official sample-exam structure emphasizes Rules of the Road, deck seamanship and safety, navigation fundamentals, and chart-plotting competence.
Exam sponsor: U.S. Coast Guard National Maritime Center (NMC) / Regional Exam Centers. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Assessment
Original ONC06 path: Rules of the Road (50), Deck General (50), Deck Safety (50), Navigation General (50), and Chart Plot (10). Raise of grade from OUPV Near Coastal uses module Q165 (50 questions).
Time Limit
Up to 3.5 hours per module
Passing Score
70% most modules; 90% Rules of the Road and Chart Plot
Reported exam pass rate: Not publicly disclosed. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the USCG Master 100 vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How do the USCG Master 100 vocabulary games work?
There are 4 games built on 20 USCG Master 100 terms. In Guess the Term, a clue describes one term and you have six tries to spell it, with green, yellow and gray letters showing how close you are. In Term Match, six terms appear as colored tiles; swap neighbors to line up three or more of the same term, and each match shows what the term means. In Term Pairs, twelve face-down cards hide six pairs of terms; flip two at a time to find each pair, and every pair you find shows what the term means. In Term Search, five terms hide in a grid of letters, reading across, down or diagonally; drag across a term to circle it, and each term you find shows what it means.
Where do the USCG Master 100 terms come from?
OpenExamPrep researched each term from the U.S. Coast Guard National Maritime Center (NMC) / Regional Exam Centers content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
How many questions are on the USCG Master 100-Ton exam?
For the original ONC06 path, the Coast Guard sample-exam guide shows 210 total questions: Rules of the Road (50), Deck General (50), Deck Safety (50), Navigation General (50), and Chart Plot (10). If you are raising grade from OUPV Near Coastal to Master Less Than 100 GRT Near Coastal, the guide lists a separate 50-question Q165 module instead.
What passing score do I need?
Most modules require 70% to pass. Rules of the Road and the Chart Plot module are stricter and require 90%, which means you need especially strong mastery of collision-avoidance rules and basic chart-work accuracy.