Free USCG Master 100 Exam Prep
USCG Master 100-Ton Captain License (Master Less Than 100 GRT)
Prepare for the USCG Master 100 exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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USCG USCG Captain Licenses License: Complete Roadmap
Follow this path to organize your licensing and exam preparation
Rules of the Road FirstYou are here
Front-load collision-avoidance rules, lights, shapes, and sound signals because Rules carries a 90% pass requirement.
Deck General + Deck Safety
Cover seamanship, anchoring, documentation, stability basics, required safety equipment, emergency response, and pollution-control duties.
Navigation General
Review charts, aids to navigation, tides, currents, bearings, piloting, dead reckoning, and weather products.
Chart Plot + Timed Drills
Finish with repeated course, speed, time, set, drift, and fix problems under timed 50-question module conditions.
Can You Take the USCG Master 100 Exam?
Check if you meet the basic eligibility requirements
- •Submit through the current NMC application process and pay fees through Pay.gov.
- •Complete required medical and drug-testing documentation for MMC issuance.
- •Pass the required examination modules for your route and endorsement path.
USCG Master 100 Quick Facts
Time to Get Licensed
4-10 weeks for most exam-focused candidates after they already qualify to apply
From start to license in hand
Exam Provider
U.S. Coast Guard Regional Exam Centers (REC) / National Maritime Center
Total Cost Breakdown
Free USCG Master 100 Prep Tools
Reported exam pass rate: USCG does not publish a public first-time pass rate for Master Less Than 100 GRT examinations.. Check the exam sponsor for the latest official figure.
200 Practice Questions
Practice bank mapped to all five official ONC06 module areas.
AI-Powered Review
Get targeted feedback on Rules, deck safety, navigation, and chart-plot logic.
2026 Updated
Built around the current official module structure plus Pay.gov and ASAP process changes.
Free Access
Start training before you commit to the official Coast Guard exam process.
What You'll Study
17 chapters covering the exam topics in this guide
Introduction: Master 100 Credential
4 sections
Rules of the Road: Foundation
4 sections
Rules of the Road: Steering & Sailing
4 sections
Rules of the Road: Responsibilities & Visibility
4 sections
Rules of the Road: Lights & Shapes Detail
4 sections
Rules of the Road: Sound, Light & Distress Signals
3 sections
Deck General: Seamanship
4 sections
Deck General: Maneuvering
4 sections
Deck General: Ops, Engines & Documents
4 sections
Deck Safety: Fire & Lifesaving
4 sections
Deck Safety: Emergencies
4 sections
Deck Safety: Pollution & Crew Safety
3 sections
Navigation General: Charts & Aids to Navigation
4 sections
Navigation General: Compass & Piloting
4 sections
Navigation General: Tides, Currents & Weather
4 sections
Navigation General: Electronics & Radio
2 sections
Chart Plotting (90% Module)
4 sections
USCG Master 100 Exam Details
USCG Master 100-Ton Captain License (Master Less Than 100 GRT)
Administered by U.S. Coast Guard National Maritime Center (NMC)
Exam Content Breakdown
Based on the official U.S. Coast Guard National Maritime Center (NMC) content outline
COLREGS/Inland Rules scenarios involving lookout, collision risk, steering and sailing rules, lights, day shapes, sound signals, narrow channels, and TSS.
Seamanship, line handling, anchoring, stability and tonnage basics, vessel documentation, passenger-service procedures, and watchstanding.
Required safety gear, fire response, flooding and damage control, survival actions, first aid, heavy weather, and pollution prevention.
Charts and publications, aids to navigation, tides and currents, compass and bearings, piloting, dead reckoning, and weather interpretation.
Course, speed, time, distance, set and drift, and fix determination using basic chart-work logic.
What's Included
17 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
Free to Start
No credit card required
Quality Exam Prep Shouldn't Cost Hundreds
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USCG Master 100 Exam FAQ
Official U.S. Coast Guard National Maritime Center (NMC) Resources
Verify information with these official sources
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