FoxExams
USA
U.S. Coast Guard Merchant Mariner Credential Master 100 Tons Examination
600 questions
Session complete
Keep going in the FoxExams app for adaptive practice, mocks, and Ask Fox.
See you tomorrow
About this exam
The U.S. Coast Guard Merchant Mariner Credential Master 100 Tons Examination assesses knowledge needed for a Master endorsement on eligible vessels up to 100 gross tons. It is taken by mariners pursuing that credential, subject to the Coast Guard’s sea-service, application, and other qualification requirements. Passing an exam is only one part of the credentialing process; it does not by itself issue a license. Candidates should confirm the current requirements for their route and intended service with the National Maritime Center (NMC).
Expect preparation to cover navigation and deck knowledge, with requirements depending on the endorsement sought and current Coast Guard procedures. Common review areas include chart plotting and chart symbols, coastal piloting, bearings and position fixes, dead reckoning, course, speed and distance, and magnetic or gyro compass errors. Exam arrangements and subject modules can vary, so consult current NMC guidance rather than relying on an old checklist. Customs and immigration duties may matter for border-crossing work, but review those separately from the credential’s navigation and deck examination topics.
How to prepare for the Master 100 Tons examination
- Review the current NMC checklist and applicable examination topic outlines for your endorsement route; verify testing arrangements and required modules with the appropriate Regional Exam Center or approved course.
- Practice chart plotting step by step: identify symbols, plot bearings and fixes, and solve dead-reckoning problems involving course, speed, and distance. Check each calculation and plotted position against the chart and stated assumptions.
- Use timed multiple-choice practice to spot weak areas, then revisit the rules or references behind missed answers. Include compass-error problems and coastal piloting, not just memorization of terms.
FAQ
Who takes the USCG Master 100 Tons exam?
Mariners seeking a Master endorsement for eligible vessels up to 100 gross tons may need to complete the required examination as part of their credential application. Sea service and other qualifications also apply, so check the current NMC requirements for your intended endorsement.
What is the format of the Master 100 Tons exam?
The examination commonly includes multiple-choice knowledge questions, and navigation requirements may include chart-plotting problems. The exact modules and testing arrangements depend on the endorsement route and current Coast Guard procedures; confirm the details with the NMC or the relevant Regional Exam Center.
What subjects should I study for the Master 100 Tons exam?
Review the current topic outline for your route. Navigation study commonly includes chart symbols and plotting, coastal piloting, bearings and position fixes, dead reckoning, course, speed and distance, and compass errors, along with applicable deck and rules-of-the-road material.